A370456 - cp's OEIS frontend

A370456 a(0) = 1, a(n) = (1/2) * Sum_{j=1..n} (1-(-1)^j-(-2)^j) * binomial(n,j) * a(n-j) for n > 0.

n	a(n)
0	1
1	2
2	6
3	29
4	192
5	1577
6	15516
7	178229
8	2339952
9	34559057
10	567117876
11	10237161629
12	201592448712
13	4300618438937
14	98803485774636
15	2432074390036229
16	63857242954421472
17	1781444969999245217
18	52620896463516221796
19	1640684857196257578029
20	53847865360369426418232

[1, 2, 6, 29, 192, 1577, 15516, 178229, 2339952, 34559057, 567117876, 10237161629, 201592448712, 4300618438937, 98803485774636, 2432074390036229, 63857242954421472, 1781444969999245217, 52620896463516221796, 1640684857196257578029, 53847865360369426418232]

cp's OEIS Frontend

A370456 a(0) = 1, a(n) = (1/2) * Sum_{j=1..n} (1-(-1)^j-(-2)^j) * binomial(n,j) * a(n-j) for n > 0.

Table of values

List of values