A217421 - cp's OEIS frontend

A217421 G.f.: Sum_{n>=0} x^n * Sum_{k=0..n} binomial(n,k)^3 * x^k*(1-x)^(n-k).

n	a(n)
0	1
1	1
2	1
3	7
4	19
5	37
6	151
7	541
8	1477
9	4999
10	18277
11	58651
12	195001
13	694747
14	2380429
15	8091223
16	28449667
17	99709057
18	346212319
19	1217144833
20	4300487251
21	15137730889
22	53484426379
23	189831062953
24	673630230931
25	2393381462941
26	8527594750507
27	30416413412917
28	108577772050459

[1, 1, 1, 7, 19, 37, 151, 541, 1477, 4999, 18277, 58651, 195001, 694747, 2380429, 8091223, 28449667, 99709057, 346212319, 1217144833, 4300487251, 15137730889, 53484426379, 189831062953, 673630230931, 2393381462941, 8527594750507, 30416413412917, 108577772050459]

cp's OEIS Frontend

A217421 G.f.: Sum_{n>=0} x^n * Sum_{k=0..n} binomial(n,k)^3 * x^k*(1-x)^(n-k).

Table of values

List of values