A184894 - cp's OEIS frontend

A184894 a(n) equals the coefficient of x^(2n-1) in the n-th iteration of x+x^3 for n>=1.

n	a(n)
1	1
2	2
3	9
4	78
5	1045
6	19320
7	458304
8	13306902
9	457649757
10	18202765482
11	822272600160
12	41592018711672
13	2329051560965532
14	143045976577538632
15	9561491720518777632
16	690994864767311671302
17	53688078414653072521485
18	4462898094035056790939070

[1, 2, 9, 78, 1045, 19320, 458304, 13306902, 457649757, 18202765482, 822272600160, 41592018711672, 2329051560965532, 143045976577538632, 9561491720518777632, 690994864767311671302, 53688078414653072521485, 4462898094035056790939070]

cp's OEIS Frontend

A184894 a(n) equals the coefficient of x^(2n-1) in the n-th iteration of x+x^3 for n>=1.

Table of values

List of values