A185522 - cp's OEIS frontend

A185522 a(n) equals the coefficient of x^n in the (n-1)-th iteration of x*(1+x)/(1-x) for n>=1.

n	a(n)
1	1
2	2
3	12
4	138
5	2320
6	51450
7	1418004
8	46736466
9	1793145792
10	78506270994
11	3862498271324
12	210975923301242
13	12668208032568400
14	829409050807729002
15	58804315058897866020
16	4488388292080413635362
17	366956820758560590789376

[1, 2, 12, 138, 2320, 51450, 1418004, 46736466, 1793145792, 78506270994, 3862498271324, 210975923301242, 12668208032568400, 829409050807729002, 58804315058897866020, 4488388292080413635362, 366956820758560590789376]

cp's OEIS Frontend

A185522 a(n) equals the coefficient of x^n in the (n-1)-th iteration of x*(1+x)/(1-x) for n>=1.

Table of values

List of values