A083411 - cp's OEIS frontend

A083411 a(n) = Sum(((k-1)/2)k!Stirling_2(n,k),k=1..n).

n	a(n)
1	0
2	1
3	9
4	79
5	765
6	8311
7	100989
8	1362439
9	20246445
10	328972471
11	5805917469
12	110645911399
13	2265191981325
14	49589790516631
15	1156201277261949
16	28605950745797959
17	748605590542359405
18	20661245832389468791
19	599820758571599742429
20	18272940402442730318119
21	582867486201919540724685

[0, 1, 9, 79, 765, 8311, 100989, 1362439, 20246445, 328972471, 5805917469, 110645911399, 2265191981325, 49589790516631, 1156201277261949, 28605950745797959, 748605590542359405, 20661245832389468791, 599820758571599742429, 18272940402442730318119, 582867486201919540724685]

cp's OEIS Frontend

A083411 a(n) = Sum(((k-1)/2)k!Stirling_2(n,k),k=1..n).

Table of values

List of values

cp's OEIS Frontend

A083411 a(n) = Sum(((k-1)/2)*k!*Stirling_2(n,k),k=1..n).

Table of values

List of values

A083411 a(n) = Sum(((k-1)/2)k!Stirling_2(n,k),k=1..n).