A214669 - cp's OEIS frontend

A214669 a(n) = Sum_{k=1..n(n+1)/2} k A214670(n,k).

n	a(n)
1	1
2	-4
3	36
4	-720
5	29264
6	-2370368
7	379341376
8	-119616350464
9	74306729686272
10	-91021121260127232
11	220137897341768508416
12	-1052620193410626774192128
13	9963741205378506824566067200
14	-186912918064963001770860269879296
15	6955904583765468148520677987319955456

[1, -4, 36, -720, 29264, -2370368, 379341376, -119616350464, 74306729686272, -91021121260127232, 220137897341768508416, -1052620193410626774192128, 9963741205378506824566067200, -186912918064963001770860269879296, 6955904583765468148520677987319955456]

cp's OEIS Frontend

A214669 a(n) = Sum_{k=1..n(n+1)/2} k A214670(n,k).

Table of values

List of values

cp's OEIS Frontend

A214669 a(n) = Sum_{k=1..n*(n+1)/2} k * A214670(n,k).

Table of values

List of values

A214669 a(n) = Sum_{k=1..n(n+1)/2} k A214670(n,k).