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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.

A346939 a(n) = Sum_{d|n} mu(n/d) * binomial(8*d,d) / (7*d+1).

Table of values

n a(n)
1 1
2 7
3 91
4 1232
5 18277
6 285285
7 4638347
8 77650784
9 1329890613
10 23190011435
11 410333440535
12 7349042707872
13 132969010888279
14 2426870701777445
15 44627576949345735
16 826044435331747776
17 15378186970730687399
18 287756293702214647875
19 5409093674555090316299
20 102094541350713952736608

List of values

[1, 7, 91, 1232, 18277, 285285, 4638347, 77650784, 1329890613, 23190011435, 410333440535, 7349042707872, 132969010888279, 2426870701777445, 44627576949345735, 826044435331747776, 15378186970730687399, 287756293702214647875, 5409093674555090316299, 102094541350713952736608]

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

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