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.

A082173 a(0)=1; for n >= 1, a(n) = Sum_{k=0..n} 11^k*N(n,k) where N(n,k) = (1/n)*C(n,k)*C(n,k+1) are the Narayana numbers (A001263).

Table of values

n a(n)
0 1
1 1
2 12
3 155
4 2124
5 30482
6 453432
7 6936799
8 108507180
9 1727970542
10 27924685416
11 456820603086
12 7550600079672
13 125905525750500
14 2115511349837040
15 35782547891727495
16 608787760350045420
17 10411451736723707990

List of values

[1, 1, 12, 155, 2124, 30482, 453432, 6936799, 108507180, 1727970542, 27924685416, 456820603086, 7550600079672, 125905525750500, 2115511349837040, 35782547891727495, 608787760350045420, 10411451736723707990]