cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A111196 a(n) = 2^(-n)*Sum_{k=0..n} binomial(2*n+1, 2*k+1)*A000364(n-k).

Table of values

n a(n)
0 1
1 2
2 9
3 78
4 1141
5 25442
6 804309
7 34227438
8 1886573641
9 130746521282
10 11127809595009
11 1141012634368398
12 138730500808639741
13 19735099323279743522
14 3247323803322747092109
15 611982206046097666022958

List of values

[1, 2, 9, 78, 1141, 25442, 804309, 34227438, 1886573641, 130746521282, 11127809595009, 1141012634368398, 138730500808639741, 19735099323279743522, 3247323803322747092109, 611982206046097666022958]