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.

A286227 Number of compositions (ordered partitions) of n into parts with an even number of prime divisors (counted with multiplicity).

Table of values

n a(n)
0 1
1 1
2 1
3 1
4 2
5 3
6 5
7 7
8 10
9 15
10 24
11 36
12 53
13 78
14 118
15 179
16 271
17 405
18 605
19 907
20 1366
21 2055
22 3086
23 4628
24 6948
25 10440
26 15689
27 23560
28 35371
29 53110
30 79771
31 119821
32 179958
33 270243
34 405833
35 609495
36 915394
37 1374780
38 2064647
39 3100680
40 4656676
41 6993575
42 10503180
43 15773877
44 23689467
45 35577360

List of values

[1, 1, 1, 1, 2, 3, 5, 7, 10, 15, 24, 36, 53, 78, 118, 179, 271, 405, 605, 907, 1366, 2055, 3086, 4628, 6948, 10440, 15689, 23560, 35371, 53110, 79771, 119821, 179958, 270243, 405833, 609495, 915394, 1374780, 2064647, 3100680, 4656676, 6993575, 10503180, 15773877, 23689467, 35577360]

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

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