A156613 First nonzero digit in decimal expansion in (e^n)/n!.

1, 2, 3, 3, 2, 1, 5, 2, 7, 2, 6, 1, 3, 7, 1, 2, 4, 6, 1, 1, 1, 2, 3, 3, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 8, 6, 4, 2, 1, 1, 7, 4, 2, 1, 9, 5, 3, 1, 9, 4, 2, 1, 6, 2, 1, 6, 3, 1, 6, 2, 1, 4, 2, 8, 3, 1, 5

Offset

0,2

Comments

Occurrence of seven 4's starting at a(24) is of special interest.

Links

Paolo Xausa, Table of n, a(n) for n = 0..10000

Example

(e^2)/(2!) = 3.69452804..., so a(2) = 3.

Mathematica

Table[RealDigits[(E^n)/n!, 10, 1][[1, 1]], {n, 0, 100}] (* Paolo Xausa, Apr 29 2024 *)

Crossrefs

Cf. A000142, A001113.

Sequence in context: A282013 A275299 A205100 * A285555 A078041 A154840

Adjacent sequences: A156610 A156611 A156612 * A156614 A156615 A156616

Keyword

nonn,base

Author

Avik Roy (avik_3.1416(AT)yahoo.co.in), Feb 11 2009

Status

approved