A157163 - cp's OEIS frontend

A157163 Product_{n>=1} (1 + 2a(n)x^n) = Sum_{k>=0} binomial(2k, k)x^k = 1/sqrt(1 - 4*x), with the central binomial numbers A000984(n).

n	a(n)
1	1
2	3
3	4
4	27
5	48
6	156
7	576
8	2955
9	7168
10	27792
11	95232
12	352188
13	1290240
14	5105856
15	17743872
16	77010795
17	252641280
18	1000224768
19	3616800768
20	14484040464
21	52102692864
22	208963943424
23	764877471744
24	3025006038012
25	11258183024640
26	44968060784640
27	166308918329344

[1, 3, 4, 27, 48, 156, 576, 2955, 7168, 27792, 95232, 352188, 1290240, 5105856, 17743872, 77010795, 252641280, 1000224768, 3616800768, 14484040464, 52102692864, 208963943424, 764877471744, 3025006038012, 11258183024640, 44968060784640, 166308918329344]

cp's OEIS Frontend

A157163 Product_{n>=1} (1 + 2a(n)x^n) = Sum_{k>=0} binomial(2k, k)x^k = 1/sqrt(1 - 4*x), with the central binomial numbers A000984(n).

Table of values

List of values

cp's OEIS Frontend

A157163 Product_{n>=1} (1 + 2*a(n)*x^n) = Sum_{k>=0} binomial(2*k, k)*x^k = 1/sqrt(1 - 4*x), with the central binomial numbers A000984(n).

Table of values

List of values

A157163 Product_{n>=1} (1 + 2a(n)x^n) = Sum_{k>=0} binomial(2k, k)x^k = 1/sqrt(1 - 4*x), with the central binomial numbers A000984(n).