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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.

A213344 2-quantum transitions in systems of N>=2 spin 1/2 particles, in columns by combination indices.

Table of values

n a(n)
2 1
3 6
4 24
5 4
6 80
7 40
8 240
9 240
10 15
11 672
12 1120
13 210
14 1792
15 4480
16 1680
17 56
18 4608
19 16128
20 10080
21 1008
22 11520
23 53760
24 50400
25 10080
26 210
27 28160
28 168960
29 221760
30 73920
31 4620
32 67584
33 506880
34 887040
35 443520
36 55440
37 792

List of values

[1, 6, 24, 4, 80, 40, 240, 240, 15, 672, 1120, 210, 1792, 4480, 1680, 56, 4608, 16128, 10080, 1008, 11520, 53760, 50400, 10080, 210, 28160, 168960, 221760, 73920, 4620, 67584, 506880, 887040, 443520, 55440, 792]

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

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