A160568 - cp's OEIS frontend

A160568 Diagonal sums of number triangle [k<=n]*C(n,2n-2k)3^(n-k)A000108(n-k).

n	a(n)
0	1
1	0
2	1
3	3
4	1
5	9
6	19
7	18
8	91
9	165
10	271
11	990
12	1765
13	3843
14	11467
15	21630
16	53299
17	140724
18	287119
19	736101
20	1818235
21	3982044
22	10225117
23	24521409
24	56584243
25	143641017
26	341948179
27	816095982
28	2045559205
29	4888806237
30	11897144767
31	29540684052

[1, 0, 1, 3, 1, 9, 19, 18, 91, 165, 271, 990, 1765, 3843, 11467, 21630, 53299, 140724, 287119, 736101, 1818235, 3982044, 10225117, 24521409, 56584243, 143641017, 341948179, 816095982, 2045559205, 4888806237, 11897144767, 29540684052]

cp's OEIS Frontend

A160568 Diagonal sums of number triangle [k<=n]*C(n,2n-2k)3^(n-k)A000108(n-k).

Table of values

List of values