A059582 First differences give digits of Pi = 3.1415926...

1, 4, 5, 9, 10, 15, 24, 26, 32, 37, 40, 45, 53, 62, 69, 78, 81, 83, 86, 94, 98, 104, 106, 112, 116, 119, 122, 130, 133, 135, 142, 151, 156, 156, 158, 166, 174, 178, 179, 188, 195, 196, 202, 211, 214, 223, 232, 235, 242, 247, 248, 248, 253, 261, 263, 263, 272

Offset

0,2

Comments

A more natural variant is given by A046974, the partial sums of the digits of Pi (A000796). Maybe the present version is motivated by the coincidence that the first four digits 1,4,5,9 are similar to the decimals .14159 of Pi. - M. F. Hasler, Jan 19 2015

Links

Harry J. Smith, Table of n, a(n) for n = 0..2000

A. Frank & P. Jacqueroux, International Contest, 2001. Item 14

Maple

Digits := 200: it := evalf(Pi, 200)/10: out := 1: for i from 1 to 200 do printf(`%d, `, out): out := out+floor(10*it): it := 10*it-floor(10*it): od:

Mathematica

Accumulate[Join[{1}, RealDigits[Pi, 10, 60][[1]]]] (* Harvey P. Dale, Jan 18 2015 *)

Prog

(PARI) { default(realprecision, 2080); a=1; x=Pi/10; for (n=0, 2000, d=floor(x); x=(x-d)*10; write("b059582.txt", n, " ", a+=d)); } \\ Harry J. Smith, Jun 28 2009

Crossrefs

Cf. A253906, A253907.

Sequence in context: A032381 A191888 A050036 * A257058 A189889 A329451

Adjacent sequences: A059579 A059580 A059581 * A059583 A059584 A059585

Keyword

nonn,base,easy

Author

Rodolfo Kurchan, Feb 17 2001

Extensions

More terms from James A. Sellers, Feb 19 2001

Status

approved