A346550 - cp's OEIS frontend

A346550 Expansion of Sum_{k>=0} k! * x^k * (1 + x)^(k+1).

n	a(n)
0	1
1	2
2	4
3	13
4	54
5	278
6	1704
7	12126
8	98280
9	893904
10	9017280
11	99918120
12	1206500400
13	15768729360
14	221792780160
15	3340515069360
16	53641756586880
17	914849722725120
18	16514863528665600
19	314599179867396480
20	6306817346711481600
21	132727279189258656000

[1, 2, 4, 13, 54, 278, 1704, 12126, 98280, 893904, 9017280, 99918120, 1206500400, 15768729360, 221792780160, 3340515069360, 53641756586880, 914849722725120, 16514863528665600, 314599179867396480, 6306817346711481600, 132727279189258656000]

cp's OEIS Frontend

A346550 Expansion of Sum_{k>=0} k! * x^k * (1 + x)^(k+1).

Table of values

List of values