login
A054278
Positions of 2's in the decimal expansion of exp(1).
2
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
MATHEMATICA
Flatten[Position[RealDigits[E, 10, 1000][[1]], 2]] (* Vincenzo Librandi, Oct 07 2013 *)
CROSSREFS
Cf. A001113.
Sequence in context: A369318 A276194 A157970 * A210978 A211434 A182388
KEYWORD
nonn,base
AUTHOR
Simon Plouffe, Feb 20 2000
STATUS
approved