A158262 - cp's OEIS frontend

A158262 a(n) = coefficient of x^n in the (2^n)-th iteration of x+x^2 for n>=1.

n	a(n)
1	1
2	4
3	56
4	3480
5	912640
6	969917088
7	4106848523904
8	68973668731925376
9	4597014244761562326272
10	1218175506582318206655794688
11	1285897546575275148015361075150848

[1, 4, 56, 3480, 912640, 969917088, 4106848523904, 68973668731925376, 4597014244761562326272, 1218175506582318206655794688, 1285897546575275148015361075150848]

cp's OEIS Frontend

A158262 a(n) = coefficient of x^n in the (2^n)-th iteration of x+x^2 for n>=1.

Table of values

List of values