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.

A337010 a(n) = exp(-1/2) * Sum_{k>=0} (2*k + 3)^n / (2^k * k!).

Table of values

n a(n)
0 1
1 4
2 18
3 92
4 532
5 3440
6 24552
7 191280
8 1612304
9 14597952
10 141123872
11 1449324992
12 15743376704
13 180203389696
14 2166381979264
15 27274611880704
16 358690234163456
17 4916123783848960
18 70076765972288000
19 1036967662211324928
20 15902394743591408640

List of values

[1, 4, 18, 92, 532, 3440, 24552, 191280, 1612304, 14597952, 141123872, 1449324992, 15743376704, 180203389696, 2166381979264, 27274611880704, 358690234163456, 4916123783848960, 70076765972288000, 1036967662211324928, 15902394743591408640]