A082545 - cp's OEIS frontend

A082545 a(n) = (2n)! Sum_{k=0..n} binomial(n,k)/(n+k)!.

n	a(n)
0	1
1	3
2	21
3	229
4	3393
5	63591
6	1442173
7	38398641
8	1174226049
9	40558249963
10	1561734494661
11	66335687785533
12	3081211226192641
13	155369391396527439
14	8452596370942940973
15	493494408990278911561
16	30777323181433121541633
17	2042075395611656190239571

[1, 3, 21, 229, 3393, 63591, 1442173, 38398641, 1174226049, 40558249963, 1561734494661, 66335687785533, 3081211226192641, 155369391396527439, 8452596370942940973, 493494408990278911561, 30777323181433121541633, 2042075395611656190239571]

cp's OEIS Frontend

A082545 a(n) = (2n)! Sum_{k=0..n} binomial(n,k)/(n+k)!.

Table of values

List of values

cp's OEIS Frontend

A082545 a(n) = (2*n)! * Sum_{k=0..n} binomial(n,k)/(n+k)!.

Table of values

List of values

A082545 a(n) = (2n)! Sum_{k=0..n} binomial(n,k)/(n+k)!.