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.

A376766 a(n) = 1 + Sum_{k=1..n, j=1..k} binomial(n,k)*binomial(n,j)*|Stirling_1(k,j)|*j!.

Table of values

n a(n)
0 1
1 2
2 9
3 67
4 709
5 9766
6 165751
7 3342081
8 78023905
9 2069303986
10 61440372701
11 2018742611535
12 72713594116285
13 2848845086153782
14 120610707912196867
15 5486918880456879061
16 266925386719765703169
17 13827085272988988990146
18 759855686741314297312177
19 44152359275709028329389627

List of values

[1, 2, 9, 67, 709, 9766, 165751, 3342081, 78023905, 2069303986, 61440372701, 2018742611535, 72713594116285, 2848845086153782, 120610707912196867, 5486918880456879061, 266925386719765703169, 13827085272988988990146, 759855686741314297312177, 44152359275709028329389627]