A216434 - cp's OEIS frontend

A216434 G.f. satisfies: A(x) = (1 + x(2-x)A(x)) * (1 + x^2*A(x)).

n	a(n)
0	1
1	2
2	4
3	10
4	27
5	74
6	208
7	600
8	1762
9	5244
10	15788
11	48006
12	147199
13	454618
14	1412960
15	4416016
16	13869998
17	43756124
18	138587784
19	440523892
20	1404849486
21	4493472836
22	14411800352
23	46338611632
24	149338703380
25	482315951104
26	1560824670460
27	5060345244766
28	16434480777703

[1, 2, 4, 10, 27, 74, 208, 600, 1762, 5244, 15788, 48006, 147199, 454618, 1412960, 4416016, 13869998, 43756124, 138587784, 440523892, 1404849486, 4493472836, 14411800352, 46338611632, 149338703380, 482315951104, 1560824670460, 5060345244766, 16434480777703]

cp's OEIS Frontend

A216434 G.f. satisfies: A(x) = (1 + x(2-x)A(x)) * (1 + x^2*A(x)).

Table of values

List of values

cp's OEIS Frontend

A216434 G.f. satisfies: A(x) = (1 + x*(2-x)*A(x)) * (1 + x^2*A(x)).

Table of values

List of values

A216434 G.f. satisfies: A(x) = (1 + x(2-x)A(x)) * (1 + x^2*A(x)).