A089669 - cp's OEIS frontend

A089669 a(n) = S3(n,1), where S3(n, t) = Sum_{k=0..n} k^t *(Sum_{j=0..k} binomial(n,j))^3.

n	a(n)
0	0
1	8
2	155
3	2286
4	29296
5	344140
6	3807774
7	40327280
8	413058080
9	4120742808
10	40242188170
11	386141947972
12	3650905945872
13	34087726136672
14	314844824466704
15	2880757518523200
16	26141327872575616
17	235490128979282224
18	2107598857648209954
19	18752794473550896332

[0, 8, 155, 2286, 29296, 344140, 3807774, 40327280, 413058080, 4120742808, 40242188170, 386141947972, 3650905945872, 34087726136672, 314844824466704, 2880757518523200, 26141327872575616, 235490128979282224, 2107598857648209954, 18752794473550896332]

cp's OEIS Frontend

A089669 a(n) = S3(n,1), where S3(n, t) = Sum_{k=0..n} k^t *(Sum_{j=0..k} binomial(n,j))^3.

Table of values

List of values