A089663 - cp's OEIS frontend

A089663 a(n) = S1(n, 6), 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	259
3	6284
4	77180
5	646960
6	4235864
7	23313408
8	112793088
9	493969920
10	1998346240
11	7577934848
12	27232132096
13	93517705216
14	308908943360
15	986642513920
16	3059995508736
17	9247515082752
18	27310549696512
19	79012328898560
20	224396746424320
21	626707269681152

[0, 2, 259, 6284, 77180, 646960, 4235864, 23313408, 112793088, 493969920, 1998346240, 7577934848, 27232132096, 93517705216, 308908943360, 986642513920, 3059995508736, 9247515082752, 27310549696512, 79012328898560, 224396746424320, 626707269681152]

cp's OEIS Frontend

A089663 a(n) = S1(n, 6), where S1(n, t) = Sum_{k=0..n} (k^t * Sum_{j=0..k} binomial(n,j)).

Table of values

List of values