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.

A213351 9-quantum transitions in systems of N >= 9 spin 1/2 particles, in columns by combination indices.

Table of values

n a(n)
9 1
10 20
11 220
12 11
13 1760
14 264
15 11440
16 3432
17 78
18 64064
19 32032
20 2184
21 320320
22 240240
23 32760
24 455
25 1464320
26 1537536
27 349440
28 14560
29 6223360
30 8712704
31 2970240
32 247520
33 2380
34 24893440
35 44808192
36 21385728
37 2970240
38 85680
39 94595072
40 212838912
41 135442944
42 28217280

List of values

[1, 20, 220, 11, 1760, 264, 11440, 3432, 78, 64064, 32032, 2184, 320320, 240240, 32760, 455, 1464320, 1537536, 349440, 14560, 6223360, 8712704, 2970240, 247520, 2380, 24893440, 44808192, 21385728, 2970240, 85680, 94595072, 212838912, 135442944, 28217280]

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

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