A350971 Expansion of e.g.f.: (sec(x)*tan(x))^2*(1+sin(x)).

0, 0, 2, 6, 40, 180, 1232, 7266, 56320, 408360, 3610112, 30974526, 309836800, 3065784540, 34342971392, 384653685786, 4778192404480, 59724464976720, 815553380483072, 11249503075325046, 167586815066767360, 2527964965265232900, 40815105402865713152, 668249973079223076306, 11626293107260590653440, 205304046476194041001080

Offset

0,3

Comments

0, 0, followed by column 3 of A350970.

Links

Table of n, a(n) for n=0..25.

Formula

E.g.f.: (sec(x)*tan(x))^2*(1+sin(x)).

Crossrefs

Cf. A000111, A225689, A350970.

Sequence in context: A336959 A027161 A081096 * A119692 A264152 A333631

Adjacent sequences: A350968 A350969 A350970 * A350972 A350973 A350974

Keyword

nonn

Author

N. J. A. Sloane, Mar 03 2022

Status

approved