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.

A242839 Number of compositions of n with difference -2 between the number of odd parts and the number of even parts, both counted without multiplicity.

Table of values

n a(n)
6 2
7 0
8 5
9 0
10 14
11 0
12 22
13 24
14 104
15 228
16 518
17 1272
18 2621
19 5986
20 11836
21 25396
22 49077
23 100200
24 192678
25 381724
26 730806
27 1424956
28 2727666
29 5271456
30 10111091
31 19503830
32 37551786
33 72600610
34 140531739
35 273027876
36 531953163
37 1040051736
38 2040532257
39 4017104634
40 7935847124

List of values

[2, 0, 5, 0, 14, 0, 22, 24, 104, 228, 518, 1272, 2621, 5986, 11836, 25396, 49077, 100200, 192678, 381724, 730806, 1424956, 2727666, 5271456, 10111091, 19503830, 37551786, 72600610, 140531739, 273027876, 531953163, 1040051736, 2040532257, 4017104634, 7935847124]

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

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