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.

A271049 a(n) = Sum_{k>=0} (Gamma(3*n+k-1)*Gamma((k+2)/3)/(Gamma(k)*Gamma(k+1)*Gamma(n-1/3+k/3)))/(3^(n-1)*exp(1)). Dobinski-type relation.

Table of values

n a(n)
0 1
1 3
2 105
3 9157
4 1467989
5 372555091
6 136839757533
7 68506049319485
8 44775766291961897
9 36988728433561712899
10 37653691956186855176881
11 46283247358178623165789813
12 67556279347568889520823938365
13 115470391901500605263068596360787

List of values

[1, 3, 105, 9157, 1467989, 372555091, 136839757533, 68506049319485, 44775766291961897, 36988728433561712899, 37653691956186855176881, 46283247358178623165789813, 67556279347568889520823938365, 115470391901500605263068596360787]