A053751 Positions of 7's in the decimal expansion of Pi.

14, 30, 40, 48, 57, 67, 97, 100, 121, 140, 157, 167, 210, 225, 233, 236, 243, 289, 300, 302, 307, 321, 344, 352, 406, 408, 413, 430, 440, 453, 459, 464, 469, 476, 479, 487, 507, 539, 541, 545, 549, 557, 560, 561

Offset

1,1

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

Index entries for sequences related to the number Pi

Formula

a(n) = A036974(n) + 1. - Georg Fischer, May 31 2021

Mathematica

Flatten[Position[RealDigits[Pi, 10, 1000][[1]], 7]] (* Vincenzo Librandi, Oct 07 2013 *)

Crossrefs

Cf. A036974.

Sequence in context: A162931 A155480 A230720 * A063311 A055039 A044075

Adjacent sequences: A053748 A053749 A053750 * A053752 A053753 A053754

Keyword

nonn,base

Author

Simon Plouffe, Feb 20 2000

Status

approved