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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.

A381630 a(n) is the least k such that the sum of k and the k-th number with n prime factors (counted with multiplicity) has n prime factors (counted with multiplicity).

Table of values

n a(n)
1 1
2 4
3 8
4 14
5 16
6 16
7 96
8 80
9 304
10 448
11 640
12 1984
13 544
14 2048
15 3584
16 20480
17 9216
18 49152
19 65536
20 524288
21 1245184
22 3309568
23 204800
24 1179648
25 28311552
26 2426880
27 29360128
28 6291456
29 27787264
30 125829120
31 67108864
32 327155712
33 1073741824

List of values

[1, 4, 8, 14, 16, 16, 96, 80, 304, 448, 640, 1984, 544, 2048, 3584, 20480, 9216, 49152, 65536, 524288, 1245184, 3309568, 204800, 1179648, 28311552, 2426880, 29360128, 6291456, 27787264, 125829120, 67108864, 327155712, 1073741824]

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

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