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.

A217924 a(n) = n! * [x^n] exp(2*exp(x) - x - 2). Row sums of triangle A217537.

Table of values

n a(n)
0 1
1 1
2 3
3 9
4 35
5 153
6 755
7 4105
8 24323
9 155513
10 1064851
11 7760745
12 59895203
13 487397849
14 4166564147
15 37298443977
16 348667014723
17 3395240969785
18 34365336725715
19 360837080222761
20 3923531021460707
21 44108832866004121
22 511948390801374835
23 6126363766802713481

List of values

[1, 1, 3, 9, 35, 153, 755, 4105, 24323, 155513, 1064851, 7760745, 59895203, 487397849, 4166564147, 37298443977, 348667014723, 3395240969785, 34365336725715, 360837080222761, 3923531021460707, 44108832866004121, 511948390801374835, 6126363766802713481]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement.