A309509 - cp's OEIS frontend

A309509 G.f. satisfies A(A(x)) = F(x), where F(x) is the g.f. for A001787(n) = n*2^(n-1).

n	a(n)
0	0
1	1
2	2
3	2
4	2
5	2
6	0
7	4
8	6
9	-58
10	100
11	1052
12	-5924
13	-21972
14	322020
15	332392
16	-21168682
17	29068598
18	1724404180
19	-7070346036
20	-172304798980
21	1290100381724
22	20728501384592
23	-247269172883976
24	-2936888518668676
25	53037176259027580
26	477640220538178184

[0, 1, 2, 2, 2, 2, 0, 4, 6, -58, 100, 1052, -5924, -21972, 322020, 332392, -21168682, 29068598, 1724404180, -7070346036, -172304798980, 1290100381724, 20728501384592, -247269172883976, -2936888518668676, 53037176259027580, 477640220538178184]

cp's OEIS Frontend

A309509 G.f. satisfies A(A(x)) = F(x), where F(x) is the g.f. for A001787(n) = n*2^(n-1).

Table of values

List of values