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.

A327495 a(n) = numerator( Sum_{j=0..n} (j!/(2^j*floor(j/2)!)^2)^2 ).

Table of values

n a(n)
0 1
1 17
2 69
3 1113
4 17817
5 285297
6 1141213
7 18260633
8 1168681737
9 18699007017
10 74796032037
11 1196736992841
12 19147791938817
13 306364680039081
14 1225458720340365
15 19607339566855065
16 5019478929156305865
17 80311662878468159865
18 321246651514020383485
19 5139946424277661728785

List of values

[1, 17, 69, 1113, 17817, 285297, 1141213, 18260633, 1168681737, 18699007017, 74796032037, 1196736992841, 19147791938817, 306364680039081, 1225458720340365, 19607339566855065, 5019478929156305865, 80311662878468159865, 321246651514020383485, 5139946424277661728785]