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.

A348478 Number of compositions of n into exactly n nonnegative parts such that each positive i-th part has the same parity as i.

Table of values

n a(n)
0 1
1 1
2 1
3 4
4 7
5 23
6 55
7 164
8 407
9 1235
10 3051
11 9432
12 23431
13 72989
14 182624
15 571384
16 1436855
17 4511979
18 11387467
19 35866100
20 90782837
21 286622226
22 727226578
23 2300578392
24 5848776767
25 18533394763
26 47197285045
27 149769168304
28 381956145802
29 1213526310665
30 3098742448230

List of values

[1, 1, 1, 4, 7, 23, 55, 164, 407, 1235, 3051, 9432, 23431, 72989, 182624, 571384, 1436855, 4511979, 11387467, 35866100, 90782837, 286622226, 727226578, 2300578392, 5848776767, 18533394763, 47197285045, 149769168304, 381956145802, 1213526310665, 3098742448230]

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

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