A266083 - cp's OEIS frontend

A266083 a(n) = Sum_{k = 0..n - 1} (a(n - 1) + k) for n>0, a(0) = 1.

n	a(n)
0	1
1	1
2	3
3	12
4	54
5	280
6	1695
7	11886
8	95116
9	856080
10	8560845
11	94169350
12	1130032266
13	14690419536
14	205665873595
15	3084988104030
16	49359809664600
17	839116764298336
18	15104101757370201
19	286977933390033990
20	5739558667800679990
21	120530732023814280000
22	2651676104523914160231

[1, 1, 3, 12, 54, 280, 1695, 11886, 95116, 856080, 8560845, 94169350, 1130032266, 14690419536, 205665873595, 3084988104030, 49359809664600, 839116764298336, 15104101757370201, 286977933390033990, 5739558667800679990, 120530732023814280000, 2651676104523914160231]

cp's OEIS Frontend

A266083 a(n) = Sum_{k = 0..n - 1} (a(n - 1) + k) for n>0, a(0) = 1.

Table of values

List of values