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.

A339401 a(n) = numerator of (1/e)^n * Sum_{k>=0}(n^k*k^n)/(n!*k!).

Table of values

n a(n)
0 1
1 1
2 3
3 19
4 63
5 322
6 44683
7 941977
8 4677605
9 668520163
10 21622993111
11 9759873853
12 31135480907413
13 194137920764803
14 64440211018897379
15 3298807094967155971
16 181322497435007616497
17 532556590750629416219
18 665881649529214120845679
19 2596711638295426703997397
20 1031081559092352146579024047

List of values

[1, 1, 3, 19, 63, 322, 44683, 941977, 4677605, 668520163, 21622993111, 9759873853, 31135480907413, 194137920764803, 64440211018897379, 3298807094967155971, 181322497435007616497, 532556590750629416219, 665881649529214120845679, 2596711638295426703997397, 1031081559092352146579024047]