A124380 - cp's OEIS frontend

A124380 O.g.f.: A(x) = Sum_{n>=0} x^nProduct_{k=0..n} (1 + kx).

n	a(n)
0	1
1	1
2	2
3	4
4	9
5	22
6	57
7	157
8	453
9	1368
10	4296
11	13995
12	47138
13	163779
14	585741
15	2152349
16	8113188
17	31326760
18	123748871
19	499539900
20	2058542819
21	8651755865
22	37054078481
23	161591063250
24	717032333816
25	3235298221401
26	14834735654080
27	69085973044125

[1, 1, 2, 4, 9, 22, 57, 157, 453, 1368, 4296, 13995, 47138, 163779, 585741, 2152349, 8113188, 31326760, 123748871, 499539900, 2058542819, 8651755865, 37054078481, 161591063250, 717032333816, 3235298221401, 14834735654080, 69085973044125]

cp's OEIS Frontend

A124380 O.g.f.: A(x) = Sum_{n>=0} x^nProduct_{k=0..n} (1 + kx).

Table of values

List of values

cp's OEIS Frontend

A124380 O.g.f.: A(x) = Sum_{n>=0} x^n*Product_{k=0..n} (1 + k*x).

Table of values

List of values

A124380 O.g.f.: A(x) = Sum_{n>=0} x^nProduct_{k=0..n} (1 + kx).