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.

A242838 Number of compositions of n with difference -3 between the number of odd parts and the number of even parts, both counted without multiplicity.

Table of values

n a(n)
12 6
13 0
14 18
15 0
16 56
17 0
18 146
19 0
20 312
21 120
22 1037
23 1440
24 4658
25 9624
26 23906
27 52524
28 117032
29 255732
30 542186
31 1150920
32 2370395
33 4902948
34 9912558
35 20084700
36 40045005
37 79902108
38 157676536
39 310969848
40 608833717
41 1190681692
42 2317419418
43 4505327884
44 8732462296
45 16911676140

List of values

[6, 0, 18, 0, 56, 0, 146, 0, 312, 120, 1037, 1440, 4658, 9624, 23906, 52524, 117032, 255732, 542186, 1150920, 2370395, 4902948, 9912558, 20084700, 40045005, 79902108, 157676536, 310969848, 608833717, 1190681692, 2317419418, 4505327884, 8732462296, 16911676140]

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

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