A053747 Positions of 3's in the decimal expansion of Pi.

1, 10, 16, 18, 25, 26, 28, 44, 47, 65, 87, 92, 112, 116, 124, 138, 143, 171, 195, 197, 216, 217, 231, 232, 238, 262, 266, 275, 283, 284, 286, 301, 314, 347, 350, 359, 365, 366, 369, 383, 402, 403, 410, 421, 431

Offset

1,2

Links

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

Index entries for sequences related to the number Pi

Formula

a(1) = 1, a(n) = A037002(n-1) + 1 for n >= 2. - Georg Fischer, May 31 2021

Mathematica

Flatten[Position[RealDigits[Pi, 10, 1000][[1]], 3]] (* Vincenzo Librandi, Oct 07 2013 *)

Crossrefs

Cf. A037002.

Sequence in context: A352297 A192221 A106695 * A228491 A295667 A241763

Adjacent sequences: A053744 A053745 A053746 * A053748 A053749 A053750

Keyword

nonn,base

Author

Simon Plouffe, Feb 20 2000

Status

approved