A243869 - cp's OEIS frontend

A243869 Expansion of x^4/[(1+x)Product_{k=1..3} (1-kx)].

n	a(n)
4	1
5	5
6	20
7	70
8	231
9	735
10	2290
11	7040
12	21461
13	65065
14	196560
15	592410
16	1782691
17	5358995
18	16098830
19	48340180
20	145107921
21	435498525
22	1306845100
23	3921234350
24	11765101151
25	35298099655
26	105899891370
27	317710858920
28	953154946381
29	2859509578385
30	8578618213640

[1, 5, 20, 70, 231, 735, 2290, 7040, 21461, 65065, 196560, 592410, 1782691, 5358995, 16098830, 48340180, 145107921, 435498525, 1306845100, 3921234350, 11765101151, 35298099655, 105899891370, 317710858920, 953154946381, 2859509578385, 8578618213640]

cp's OEIS Frontend

A243869 Expansion of x^4/[(1+x)Product_{k=1..3} (1-kx)].

Table of values

List of values

cp's OEIS Frontend

A243869 Expansion of x^4/[(1+x)*Product_{k=1..3} (1-k*x)].

Table of values

List of values

A243869 Expansion of x^4/[(1+x)Product_{k=1..3} (1-kx)].