A194971 - cp's OEIS frontend

A194971 a(n) equals the coefficient of x^(2*n-1) in the n-th iteration of x+x^2 for n>=1.

n	a(n)
1	1
2	2
3	10
4	188
5	8994
6	832680
7	127104492
8	28951041456
9	9201410927608
10	3889680139527920
11	2109876998624179100
12	1428197506614652750656
13	1179911974067256647171268
14	1168294604146384807206421176
15	1365624160842343461171218423880

[1, 2, 10, 188, 8994, 832680, 127104492, 28951041456, 9201410927608, 3889680139527920, 2109876998624179100, 1428197506614652750656, 1179911974067256647171268, 1168294604146384807206421176, 1365624160842343461171218423880]

cp's OEIS Frontend

A194971 a(n) equals the coefficient of x^(2*n-1) in the n-th iteration of x+x^2 for n>=1.

Table of values

List of values