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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.

A276421 Number of palindromic compositions of n into nonprime numbers.

Table of values

n a(n)
0 1
1 1
2 1
3 1
4 2
5 1
6 3
7 1
8 5
9 3
10 7
11 4
12 11
13 6
14 16
15 9
16 25
17 14
18 38
19 21
20 59
21 34
22 89
23 50
24 137
25 77
26 208
27 117
28 319
29 180
30 486
31 273
32 744
33 420
34 1134
35 639
36 1735
37 977
38 2648
39 1491
40 4048
41 2281
42 6180
43 3480
44 9444
45 5321
46 14421
47 8122
48 22035
49 12412
50 33655
51 18957
52 51417
53 28966

List of values

[1, 1, 1, 1, 2, 1, 3, 1, 5, 3, 7, 4, 11, 6, 16, 9, 25, 14, 38, 21, 59, 34, 89, 50, 137, 77, 208, 117, 319, 180, 486, 273, 744, 420, 1134, 639, 1735, 977, 2648, 1491, 4048, 2281, 6180, 3480, 9444, 5321, 14421, 8122, 22035, 12412, 33655, 18957, 51417, 28966]

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

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