A121676 - cp's OEIS frontend

A121676 a(n) = [x^n] (1 + x*(1+x)^(n-1) )^(n+1).

n	a(n)
0	1
1	2
2	6
3	32
4	250
5	2412
6	27524
7	360600
8	5296050
9	85805420
10	1515794467
11	28926900312
12	591903009295
13	12907255696636
14	298428274844730
15	7284351640977920
16	187013495992710210
17	5033669346061547724
18	141643700005223732471

[1, 2, 6, 32, 250, 2412, 27524, 360600, 5296050, 85805420, 1515794467, 28926900312, 591903009295, 12907255696636, 298428274844730, 7284351640977920, 187013495992710210, 5033669346061547724, 141643700005223732471]

cp's OEIS Frontend

A121676 a(n) = [x^n] (1 + x*(1+x)^(n-1) )^(n+1).

Table of values

List of values