A322236 - cp's OEIS frontend

A322236 a(n) = A322237(n) / (n(n+1)/2), where A322237(n) = [x^(n-1)] Product_{k=1..n} (k + x + kx^2), for n >= 1.

n	a(n)
1	1
2	1
3	4
4	16
5	126
6	946
7	11201
8	125609
9	1988645
10	29865749
11	592326527
12	11181850967
13	266546940947
14	6069884741155
15	169005305069771
16	4510734458734443
17	143664066858425883
18	4399531515393236907
19	157747037226275555718
20	5453223770914252146978
21	217372015577641986139848
22	8374038291341888594002908
23	367340884744321785348071011
24	15606634300050239405862650475

[1, 1, 4, 16, 126, 946, 11201, 125609, 1988645, 29865749, 592326527, 11181850967, 266546940947, 6069884741155, 169005305069771, 4510734458734443, 143664066858425883, 4399531515393236907, 157747037226275555718, 5453223770914252146978, 217372015577641986139848, 8374038291341888594002908, 367340884744321785348071011, 15606634300050239405862650475]

cp's OEIS Frontend

A322236 a(n) = A322237(n) / (n(n+1)/2), where A322237(n) = [x^(n-1)] Product_{k=1..n} (k + x + kx^2), for n >= 1.

Table of values

List of values

cp's OEIS Frontend

A322236 a(n) = A322237(n) / (n*(n+1)/2), where A322237(n) = [x^(n-1)] Product_{k=1..n} (k + x + k*x^2), for n >= 1.

Table of values

List of values

A322236 a(n) = A322237(n) / (n(n+1)/2), where A322237(n) = [x^(n-1)] Product_{k=1..n} (k + x + kx^2), for n >= 1.