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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.

A380910 a(n) = denominator(n!! / (n - 1)!!).

Table of values

n a(n)
0 1
1 1
2 1
3 2
4 3
5 8
6 5
7 16
8 35
9 128
10 63
11 256
12 231
13 1024
14 429
15 2048
16 6435
17 32768
18 12155
19 65536
20 46189
21 262144
22 88179
23 524288
24 676039
25 4194304
26 1300075
27 8388608
28 5014575
29 33554432
30 9694845
31 67108864
32 300540195
33 2147483648
34 583401555
35 4294967296
36 2268783825
37 17179869184

List of values

[1, 1, 1, 2, 3, 8, 5, 16, 35, 128, 63, 256, 231, 1024, 429, 2048, 6435, 32768, 12155, 65536, 46189, 262144, 88179, 524288, 676039, 4194304, 1300075, 8388608, 5014575, 33554432, 9694845, 67108864, 300540195, 2147483648, 583401555, 4294967296, 2268783825, 17179869184]

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

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