A322893 - cp's OEIS frontend

A322893 a(n) = [x^(n-1)] Product_{k=1..n} (k + x + 2kx^2), for n >= 1.

n	a(n)
1	1
2	3
3	42
4	310
5	6165
6	74991
7	1948268
8	33402132
9	1070751825
10	23818189395
11	907365113622
12	24884202594186
13	1097379059482797
14	35843982129214455
15	1794829778206820280
16	68106808437178597960
17	3815489686616468849025
18	165072679883587905823683
19	10226191400763164277215330
20	497092886801366317217274750
21	33732223801436694239674078341
22	1820835126778068312737993859263

[1, 3, 42, 310, 6165, 74991, 1948268, 33402132, 1070751825, 23818189395, 907365113622, 24884202594186, 1097379059482797, 35843982129214455, 1794829778206820280, 68106808437178597960, 3815489686616468849025, 165072679883587905823683, 10226191400763164277215330, 497092886801366317217274750, 33732223801436694239674078341, 1820835126778068312737993859263]

cp's OEIS Frontend

A322893 a(n) = [x^(n-1)] Product_{k=1..n} (k + x + 2kx^2), for n >= 1.

Table of values

List of values

cp's OEIS Frontend

A322893 a(n) = [x^(n-1)] Product_{k=1..n} (k + x + 2*k*x^2), for n >= 1.

Table of values

List of values

A322893 a(n) = [x^(n-1)] Product_{k=1..n} (k + x + 2kx^2), for n >= 1.