A054249 - OEIS

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A054249

Alternately subtract and add 1 to digits in decimal expansion of Pi.

2, 2, 3, 2, 4, 10, 1, 7, 4, 4, 4, 9, 8, 8, 8, 4, 1, 4, 7, 5, 5, 3, 5, 5, 2, 4, 7, 4, 1, 8, 8, 6, -1, 3, 7, 9, 3, 2, 8, 8, 0, 7, 8, 4, 8, 10, 2, 8, 4, 2, -1, 6, 7, 3, -1, 10, 6, 5, 8, 5, 3, 6, 8, 3, 2, 1, 6, 9, 0, 7, 3, 1, 5, 3, 7, 7, 1, 1, 7, 10, 8, 9, 5, 3, 7, 1, 2, 5, 7, 3, 4, 4, 3, 3, 0, 2, 6, 1, 5, 8, 8

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

Table of n, a(n) for n=1..101.

R. K. Hoeflin, Ultra Test

EXAMPLE

a(1)= 3 - 1 = 2, a(2)= 1 + 1 = 2, a(3) = 4 - 1 = 3

MATHEMATICA

Total/@Partition[Riffle[RealDigits[Pi, 10, 120][[1]], {-1, 1}, {2, -1, 2}], 2] (* Harvey P. Dale, Jan 20 2016 *)

CROSSREFS

Cf. A000796.

Sequence in context: A053023 A153725 A102247 * A160273 A141822 A033099

Adjacent sequences: A054246 A054247 A054248 * A054250 A054251 A054252

KEYWORD

easy,sign,base

AUTHOR

Anonymous, Feb 13 2000

EXTENSIONS

More terms from James A. Sellers, Feb 22 2000

STATUS

approved

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