A333990 - cp's OEIS frontend

A333990 a(n) = Sum_{k=0..n} n^k * binomial(2n,2k).

n	a(n)
0	1
1	2
2	17
3	208
4	3281
5	62976
6	1419193
7	36643328
8	1064876737
9	34359869440
10	1217844546401
11	47005113741312
12	1961498610274321
13	87961440484327424
14	4217109422614386761
15	215187913985734475776
16	11641533109203575871233
17	665430291591787349803008
18	40065760383961956327231409

[1, 2, 17, 208, 3281, 62976, 1419193, 36643328, 1064876737, 34359869440, 1217844546401, 47005113741312, 1961498610274321, 87961440484327424, 4217109422614386761, 215187913985734475776, 11641533109203575871233, 665430291591787349803008, 40065760383961956327231409]

cp's OEIS Frontend

A333990 a(n) = Sum_{k=0..n} n^k * binomial(2n,2k).

Table of values

List of values

cp's OEIS Frontend

A333990 a(n) = Sum_{k=0..n} n^k * binomial(2*n,2*k).

Table of values

List of values

A333990 a(n) = Sum_{k=0..n} n^k * binomial(2n,2k).