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A053751
Positions of 7's in the decimal expansion of Pi.
3
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
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
KEYWORD
nonn,base
AUTHOR
Simon Plouffe, Feb 20 2000
STATUS
approved