A124495 - cp's OEIS frontend

A124495 G.f.: A(x) = 1/[1-x - Sum_{n>=1} A001147(n)x^(2n) ] where A001147(n) = (2n)!/(n!2^n) is the double factorials.

n	a(n)
0	1
1	1
2	2
3	3
4	8
5	14
6	43
7	81
8	283
9	556
10	2243
11	4512
12	21374
13	43469
14	243817
15	497217
16	3289606
17	6697795
18	51583952
19	104698998
20	922789643
21	1867079621
22	18522929815
23	37380015420
24	411572179999
25	828925168492
26	10014624164666
27	20140445929353

[1, 1, 2, 3, 8, 14, 43, 81, 283, 556, 2243, 4512, 21374, 43469, 243817, 497217, 3289606, 6697795, 51583952, 104698998, 922789643, 1867079621, 18522929815, 37380015420, 411572179999, 828925168492, 10014624164666, 20140445929353]

cp's OEIS Frontend

A124495 G.f.: A(x) = 1/[1-x - Sum_{n>=1} A001147(n)x^(2n) ] where A001147(n) = (2n)!/(n!2^n) is the double factorials.

Table of values

List of values

cp's OEIS Frontend

A124495 G.f.: A(x) = 1/[1-x - Sum_{n>=1} A001147(n)*x^(2n) ] where A001147(n) = (2n)!/(n!*2^n) is the double factorials.

Table of values

List of values

A124495 G.f.: A(x) = 1/[1-x - Sum_{n>=1} A001147(n)x^(2n) ] where A001147(n) = (2n)!/(n!2^n) is the double factorials.