A352470 - cp's OEIS frontend

A352470 a(0) = 1; a(n) = Sum_{k=0..floor((n-1)/2)} binomial(n,2k+1)^2 a(n-2*k-1).

n	a(n)
0	1
1	1
2	4
3	37
4	608
5	15601
6	576472
7	28993693
8	1904637184
9	158352856129
10	16253786050904
11	2018684970206653
12	298373110433984192
13	51757706826973479697
14	10412613242348421164400
15	2404755328388872932588037
16	631887117002962512609921024
17	187441600433239155105076467457

[1, 1, 4, 37, 608, 15601, 576472, 28993693, 1904637184, 158352856129, 16253786050904, 2018684970206653, 298373110433984192, 51757706826973479697, 10412613242348421164400, 2404755328388872932588037, 631887117002962512609921024, 187441600433239155105076467457]

cp's OEIS Frontend

A352470 a(0) = 1; a(n) = Sum_{k=0..floor((n-1)/2)} binomial(n,2k+1)^2 a(n-2*k-1).

Table of values

List of values

cp's OEIS Frontend

A352470 a(0) = 1; a(n) = Sum_{k=0..floor((n-1)/2)} binomial(n,2*k+1)^2 * a(n-2*k-1).

Table of values

List of values

A352470 a(0) = 1; a(n) = Sum_{k=0..floor((n-1)/2)} binomial(n,2k+1)^2 a(n-2*k-1).