OFFSET
1,3
COMMENTS
For n>1, primes p corresponding to a(n) are in A038872(n) = A045468(n-1) = A141158(n). - Ray Chandler, Jul 29 2019
REFERENCES
H. Gupta, On a conjecture of Chowla, Proc. Indian Acad. Sci., 5A (1937), 381-384.
N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
LINKS
Ray Chandler, Table of n, a(n) for n = 1..10000
H. Gupta, On a conjecture of Chowla, Proc. Indian Acad. Sci., 5A (1937), 381-384. [Annotated scanned copy]
MATHEMATICA
Join[{0}, Select[Table[(p^2-1)/120, {p, Prime[Range[200]]}], IntegerQ]] (* Harvey P. Dale, Jan 14 2020 *)
PROG
(PARI) j=[]; for(n=0, 150, x=prime(n)^2-1; if(Mod(x, 120)==0, j=concat(j, (x/120)))); j
CROSSREFS
KEYWORD
nonn
AUTHOR
EXTENSIONS
More terms from Jason Earls, Jul 29 2001
STATUS
approved