A030955 a(n) = floor(exp(4/9)*n!).

1, 3, 9, 37, 187, 1122, 7860, 62884, 565956, 5659561, 62255179, 747062150, 9711807959, 135965311436, 2039479671550, 32631674744814, 554738470661843, 9985292471913189, 189720556966350594, 3794411139327011891

Offset

1,2

Links

Michael De Vlieger, Table of n, a(n) for n = 1..449

Mathematica

Array[Floor[Exp[4/9] #!] &, 20] (* Michael De Vlieger, Jan 30 2019 *)

Crossrefs

Sequence in context: A009179 A030819 A030904 * A030856 A030943 A030803

Adjacent sequences: A030952 A030953 A030954 * A030956 A030957 A030958

Keyword

nonn

Author

Simon Plouffe

Status

approved