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.

A362301 a(n) = n! * Sum_{k=0..floor(n/3)} n^k * binomial(n-2*k,k)/(n-2*k)!.

Table of values

n a(n)
0 1
1 1
2 1
3 19
4 97
5 301
6 13681
7 124951
8 647809
9 46543897
10 612367201
11 4447574011
12 436897375201
13 7505523945349
14 70104150466897
15 8735878156045951
16 185209511009456641
17 2114594302777738801
18 319284313084581674689
19 8053189772356178472547

List of values

[1, 1, 1, 19, 97, 301, 13681, 124951, 647809, 46543897, 612367201, 4447574011, 436897375201, 7505523945349, 70104150466897, 8735878156045951, 185209511009456641, 2114594302777738801, 319284313084581674689, 8053189772356178472547]