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.

A380431 Number of powerful numbers that are not powers of primes (i.e. are in A286708) that do not exceed 2^n.

Table of values

n a(n)
0 0
1 0
2 0
3 0
4 0
5 0
6 1
7 4
8 9
9 17
10 28
11 48
12 75
13 115
14 178
15 266
16 403
17 590
18 865
19 1263
20 1830
21 2644
22 3810
23 5466
24 7838
25 11210
26 16011
27 22841
28 32530
29 46315
30 65886
31 93658
32 133060
33 188952
34 268204
35 380564
36 539823
37 765481
38 1085224
39 1538194
40 2179816
41 3088481
42 4375308
43 6197420
44 8777222

List of values

[0, 0, 0, 0, 0, 0, 1, 4, 9, 17, 28, 48, 75, 115, 178, 266, 403, 590, 865, 1263, 1830, 2644, 3810, 5466, 7838, 11210, 16011, 22841, 32530, 46315, 65886, 93658, 133060, 188952, 268204, 380564, 539823, 765481, 1085224, 1538194, 2179816, 3088481, 4375308, 6197420, 8777222]

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

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