A322238 - cp's OEIS frontend

A322238 a(n) = [x^n] Product_{k=1..n} (k + x + k*x^2), for n >= 0.

n	a(n)
0	1
1	1
2	5
3	23
4	215
5	1815
6	24495
7	302619
8	5320667
9	86715299
10	1876495799
11	38014052089
12	976259270857
13	23653053031933
14	702814658564889
15	19822951593203139
16	668803323061123779
17	21526439460249188211
18	812828119716458951775
19	29400983906741712373461
20	1228278466826435935830261
21	49325712126290139872176221
22	2258694878457443286997591293
23	99715752513094342744003434597
24	4966247793605869355035248188325

[1, 1, 5, 23, 215, 1815, 24495, 302619, 5320667, 86715299, 1876495799, 38014052089, 976259270857, 23653053031933, 702814658564889, 19822951593203139, 668803323061123779, 21526439460249188211, 812828119716458951775, 29400983906741712373461, 1228278466826435935830261, 49325712126290139872176221, 2258694878457443286997591293, 99715752513094342744003434597, 4966247793605869355035248188325]

cp's OEIS Frontend

A322238 a(n) = [x^n] Product_{k=1..n} (k + x + k*x^2), for n >= 0.

Table of values

List of values