A371028 - cp's OEIS frontend

A371028 a(n) = Sum_{k=1..n} (n + k - 1)! / (k!*(n - k)!) if n > 0 and a(0) = 1. Row sums of A370983.

n	a(n)
0	1
1	1
2	5
3	35
4	364
5	5189
6	94471
7	2095015
8	54793880
9	1651345449
10	56350158193
11	2147652456971
12	90423282500420
13	4168099478767405
14	208774492598428979
15	11291105341823941327
16	655760745772682537776
17	40705101569058847374545
18	2689347796601389962641085
19	188430347768069305315294579

[1, 1, 5, 35, 364, 5189, 94471, 2095015, 54793880, 1651345449, 56350158193, 2147652456971, 90423282500420, 4168099478767405, 208774492598428979, 11291105341823941327, 655760745772682537776, 40705101569058847374545, 2689347796601389962641085, 188430347768069305315294579]

cp's OEIS Frontend

A371028 a(n) = Sum_{k=1..n} (n + k - 1)! / (k!*(n - k)!) if n > 0 and a(0) = 1. Row sums of A370983.

Table of values

List of values