A251686 - cp's OEIS frontend

A251686 G.f.: exp( Sum_{n>=1} A132303(n)/3 * x^n/n ), where A132303(n) = sum of the cubes of the trinomial coefficients in row n of triangle A027907.

n	a(n)
0	1
1	1
2	8
3	100
4	1556
5	27260
6	515510
7	10284094
8	213433728
9	4566363088
10	100082133066
11	2236952393302
12	50817223209451
13	1170319824912699
14	27268900054818390
15	641812268110993694
16	15239341125950643462
17	364655982858022960206
18	8785745372509009963892
19	212976842702489760621536

[1, 1, 8, 100, 1556, 27260, 515510, 10284094, 213433728, 4566363088, 100082133066, 2236952393302, 50817223209451, 1170319824912699, 27268900054818390, 641812268110993694, 15239341125950643462, 364655982858022960206, 8785745372509009963892, 212976842702489760621536]

cp's OEIS Frontend

A251686 G.f.: exp( Sum_{n>=1} A132303(n)/3 * x^n/n ), where A132303(n) = sum of the cubes of the trinomial coefficients in row n of triangle A027907.

Table of values

List of values