A322237 - cp's OEIS frontend

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

n	a(n)
1	1
2	3
3	24
4	160
5	1890
6	19866
7	313628
8	4521924
9	89489025
10	1642616195
11	39093550782
12	872184375426
13	24255771626177
14	637337897821275
15	20280636608372520
16	613459886387884248
17	21980602229339160099
18	752319889132243511097
19	29971937072992355586420
20	1145176991891992950865380
21	50212935598435298798304888
22	2118631687709497814282735724
23	101386084189432812756067599036

[1, 3, 24, 160, 1890, 19866, 313628, 4521924, 89489025, 1642616195, 39093550782, 872184375426, 24255771626177, 637337897821275, 20280636608372520, 613459886387884248, 21980602229339160099, 752319889132243511097, 29971937072992355586420, 1145176991891992950865380, 50212935598435298798304888, 2118631687709497814282735724, 101386084189432812756067599036]

cp's OEIS Frontend

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

Table of values

List of values