A112487 - cp's OEIS frontend

A112487 a(n) = Sum_{k=0..n} E2(n, k)*2^k, where E2(n, k) are the second-order Eulerian numbers A340556.

n	a(n)
0	1
1	2
2	10
3	82
4	938
5	13778
6	247210
7	5240338
8	128149802
9	3551246162
10	109979486890
11	3764281873042
12	141104799067178
13	5749087305575378
14	252969604725106090
15	11955367835505775378
16	603967991604199335722
17	32479636694930586142802
18	1852497140997527094395050

[1, 2, 10, 82, 938, 13778, 247210, 5240338, 128149802, 3551246162, 109979486890, 3764281873042, 141104799067178, 5749087305575378, 252969604725106090, 11955367835505775378, 603967991604199335722, 32479636694930586142802, 1852497140997527094395050]

cp's OEIS Frontend

A112487 a(n) = Sum_{k=0..n} E2(n, k)*2^k, where E2(n, k) are the second-order Eulerian numbers A340556.

Table of values

List of values