A054278 Positions of 2's in the decimal expansion of exp(1).

1, 5, 9, 17, 23, 31, 34, 41, 63, 66, 88, 93, 99, 102, 112, 120, 132, 139, 146, 149, 163, 165, 168, 179, 183, 194, 217, 239, 253, 254, 274, 280, 298, 307, 317, 334, 342, 347, 359, 366, 372, 383, 392, 403, 411, 427

Offset

1,2

Links

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

Mathematica

Flatten[Position[RealDigits[E, 10, 1000][[1]], 2]] (* Vincenzo Librandi, Oct 07 2013 *)

Crossrefs

Cf. A001113.

Sequence in context: A005006 A276194 A157970 * A210978 A211434 A182388

Adjacent sequences: A054275 A054276 A054277 * A054279 A054280 A054281

Keyword

nonn,base

Author

Simon Plouffe, Feb 20 2000

Status

approved