A089661 - cp's OEIS frontend

A089661 a(n) = S1(n,4), where S1(n,t) = Sum_{k=0..n} k^t * Sum_{j=0..k} binomial(n,j).

n	a(n)
0	0
1	2
2	67
3	764
4	5492
5	30304
6	140672
7	577920
8	2167680
9	7577088
10	25037056
11	79016960
12	240028672
13	705961984
14	2019713024
15	5641535488
16	15431565312
17	41438281728
18	109462880256
19	284942925824
20	732004876288
21	1858158460928
22	4665915736064
23	11600782163968
24	28582042664960

[0, 2, 67, 764, 5492, 30304, 140672, 577920, 2167680, 7577088, 25037056, 79016960, 240028672, 705961984, 2019713024, 5641535488, 15431565312, 41438281728, 109462880256, 284942925824, 732004876288, 1858158460928, 4665915736064, 11600782163968, 28582042664960]

cp's OEIS Frontend

A089661 a(n) = S1(n,4), where S1(n,t) = Sum_{k=0..n} k^t * Sum_{j=0..k} binomial(n,j).

Table of values

List of values