A089662 - cp's OEIS frontend

A089662 a(n) = S1(n,5), 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	131
3	2172
4	20386
5	138580
6	763824
7	3631712
8	15470144
9	60527232
10	221297920
11	765580288
12	2529498624
13	8039103488
14	24713744384
15	73818562560
16	215011065856
17	612515381248
18	1710842904576
19	4695105732608
20	12682107944960
21	33768108982272
22	88748191645696

[0, 2, 131, 2172, 20386, 138580, 763824, 3631712, 15470144, 60527232, 221297920, 765580288, 2529498624, 8039103488, 24713744384, 73818562560, 215011065856, 612515381248, 1710842904576, 4695105732608, 12682107944960, 33768108982272, 88748191645696]

cp's OEIS Frontend

A089662 a(n) = S1(n,5), where S1(n,t) = Sum_{k=0..n} k^t * Sum_{j=0..k} binomial(n,j).

Table of values

List of values