A136557 - cp's OEIS frontend

A136557 a(n) = Sum_{k=0..n} binomial(2^k + n-k-1, k).

n	a(n)
0	1
1	2
2	6
3	45
4	1436
5	171836
6	68149425
7	89431630740
8	396956313475102
9	6099399658235428041
10	331007760926212498510464
11	64484289650612910347505873728
12	45677712418497545460138258802186905

[1, 2, 6, 45, 1436, 171836, 68149425, 89431630740, 396956313475102, 6099399658235428041, 331007760926212498510464, 64484289650612910347505873728, 45677712418497545460138258802186905]

cp's OEIS Frontend

A136557 a(n) = Sum_{k=0..n} binomial(2^k + n-k-1, k).

Table of values

List of values