A121679 - cp's OEIS frontend

A121679 a(n) = A121678(n)/(n+1) = [x^n] (1 + x*(1+x)^n )^(n+1) / (n+1).

n	a(n)
0	1
1	1
2	3
3	13
4	85
5	706
6	7042
7	81887
8	1081257
9	15911488
10	257476901
11	4533396418
12	86110501919
13	1752312402881
14	37982176570353
15	872648321081531
16	21162807249523025
17	539772371783003416
18	14433746294326451095

[1, 1, 3, 13, 85, 706, 7042, 81887, 1081257, 15911488, 257476901, 4533396418, 86110501919, 1752312402881, 37982176570353, 872648321081531, 21162807249523025, 539772371783003416, 14433746294326451095]

cp's OEIS Frontend

A121679 a(n) = A121678(n)/(n+1) = [x^n] (1 + x*(1+x)^n )^(n+1) / (n+1).

Table of values

List of values