A362524 - cp's OEIS frontend

A362524 a(n) = n! * Sum_{k=0..floor(n/2)} (k+1)^(k-1) / (2^k * k! * (n-2*k)!).

n	a(n)
0	1
1	1
2	2
3	4
4	16
5	56
6	391
7	2017
8	20504
9	139456
10	1867681
11	15751451
12	262263442
13	2638794094
14	52589415971
15	614628436801
16	14274125637256
17	190012483804952
18	5041005195499849
19	75288391385094811
20	2246914521052963166
21	37204717212894726706
22	1233884675800841217847

[1, 1, 2, 4, 16, 56, 391, 2017, 20504, 139456, 1867681, 15751451, 262263442, 2638794094, 52589415971, 614628436801, 14274125637256, 190012483804952, 5041005195499849, 75288391385094811, 2246914521052963166, 37204717212894726706, 1233884675800841217847]

cp's OEIS Frontend

A362524 a(n) = n! * Sum_{k=0..floor(n/2)} (k+1)^(k-1) / (2^k * k! * (n-2*k)!).

Table of values

List of values