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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.

A261256 Let S_k denote the sequence of numbers j such that A001222(j) - A001221(j) = k. Then a(n) is the n-th term of S_n.

Table of values

n a(n)
1 4
2 24
3 72
4 160
5 432
6 896
7 2592
8 5632
9 12800
10 26624
11 61440
12 124416
13 278528
14 622592
15 1376256
16 2949120
17 5971968
18 12058624
19 25690112
20 60817408
21 130023424
22 262144000
23 528482304
24 1107296256
25 2264924160
26 4586471424
27 9395240960
28 19864223744
29 40265318400
30 83751862272

List of values

[4, 24, 72, 160, 432, 896, 2592, 5632, 12800, 26624, 61440, 124416, 278528, 622592, 1376256, 2949120, 5971968, 12058624, 25690112, 60817408, 130023424, 262144000, 528482304, 1107296256, 2264924160, 4586471424, 9395240960, 19864223744, 40265318400, 83751862272]

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

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