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.

A242837 Number of compositions of n with difference -4 between the number of odd parts and the number of even parts, both counted without multiplicity.

Table of values

n a(n)
20 24
21 0
22 84
23 0
24 288
25 0
26 822
27 0
28 2226
29 0
30 5304
31 720
32 15034
33 10680
34 55624
35 84360
36 265200
37 527640
38 1342608
39 2886960
40 6673176
41 14433240
42 31725930
43 67718568
44 144265370
45 302771208
46 631156708
47 1303769496
48 2673673704
49 5447789784
50 11028089996
51 22211684328
52 44491303391

List of values

[24, 0, 84, 0, 288, 0, 822, 0, 2226, 0, 5304, 720, 15034, 10680, 55624, 84360, 265200, 527640, 1342608, 2886960, 6673176, 14433240, 31725930, 67718568, 144265370, 302771208, 631156708, 1303769496, 2673673704, 5447789784, 11028089996, 22211684328, 44491303391]

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

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