login

Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.

A022522
Nexus numbers (n+1)^6 - n^6.
23
1, 63, 665, 3367, 11529, 31031, 70993, 144495, 269297, 468559, 771561, 1214423, 1840825, 2702727, 3861089, 5386591, 7360353, 9874655, 13033657, 16954119, 21766121, 27613783, 34655985, 43067087, 53037649, 64775151, 78504713, 94469815, 112933017, 134176679
OFFSET
0,2
REFERENCES
J. H. Conway and R. K. Guy, The Book of Numbers, Copernicus Press, NY, 1996, p. 54.
LINKS
Eric Weisstein's World of Mathematics, Nexus Number
FORMULA
G.f.: (1+x)*(1+56*x+246*x^2+56*x^3+x^4)/(1-x)^6. - Colin Barker, Dec 21 2012
a(n) = A005408(n) * A243201(n). - Mathew Englander, Jun 06 2014
a(n) = A001014(n+1) - A001014(n). - Wesley Ivan Hurt, Jun 06 2014
E.g.f.: (1 +62*x +270*x^2 +260*x^3 +75*x^4 +6*x^5)*exp(x). - G. C. Greubel, Aug 28 2019
G.f.: polylog(-6, x)*(1-x)/x. See the g.f. of Colin Barker (with expanded numerator), and the g.f. of the rows of A008292 by Vladeta Jovovic, Sep 02 2002. - Wolfdieter Lang, May 10 2021
MAPLE
A022522:=n->(n + 1)^6 - n^6; seq(A022522(n), n=0..30); # Wesley Ivan Hurt, Jan 30 2014
MATHEMATICA
Table[(n+1)^6-n^6, {n, 0, 30}] (* Vincenzo Librandi, Nov 22 2011 *)
PROG
(Magma) [(n+1)^6-n^6: n in [0..30]]; // Vincenzo Librandi, Nov 22 2011
(PARI) a(n)=(n+1)^6-n^6 \\ Charles R Greathouse IV, Sep 24 2015
(Sage) [(n+1)^6 -n^6 for n in (0..30)] # G. C. Greubel, Aug 28 2019
(GAP) List([0..30], n-> (n+1)^6 - n^6); # G. C. Greubel, Aug 28 2019
CROSSREFS
Column k=5 of array A047969.
Beginning with n=1, a subsequence of A181125 (difference of two positive 6th powers). - Mathew Englander, Jun 01 2014
Sequence in context: A340902 A181125 A228221 * A152731 A090028 A152725
KEYWORD
nonn,easy
AUTHOR
N. J. A. Sloane, Jun 14 1998
EXTENSIONS
More terms from Colin Barker, Dec 21 2012
STATUS
approved

pFad - Phonifier reborn

Pfad - The Proxy pFad of © 2024 Garber Painting. All rights reserved.

Note: This service is not intended for secure transactions such as banking, social media, email, or purchasing. Use at your own risk. We assume no liability whatsoever for broken pages.


Alternative Proxies:

Alternative Proxy

pFad Proxy

pFad v3 Proxy

pFad v4 Proxy