A030840 [ exp(20/21)*n! ].

2, 5, 15, 62, 311, 1866, 13063, 104504, 940539, 9405390, 103459293, 1241511527, 16139649858, 225955098012, 3389326470191, 54229223523071, 921896799892209, 16594142398059779, 315288705563135817, 6305774111262716343

Offset

1,1

Links

Table of n, a(n) for n=1..20.

Mathematica

Floor[Exp[20/21]Range[30]!] (* Harvey P. Dale, Jun 17 2015 *)

Crossrefs

Sequence in context: A030860 A267558 A030852 * A030829 A030807 A030837

Adjacent sequences: A030837 A030838 A030839 * A030841 A030842 A030843

Keyword

nonn

Author

Simon Plouffe

Status

approved