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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.

A368704 a(n) is the greatest integer k whose arithmetic derivative is equal to the n-th primorial, and 0 if no such k exists.

Table of values

n a(n)
1 0
2 9
3 221
4 11021
5 1333349
6 225450221
7 65155115009
8 23520996509141
9 12442607161209161
10 10464232622576957201
11 10056127550296456854221
12 13766838616355849433396389
13 23142055714094182897602595769
14 42789661015360144177667200022669
15 94522361182930558488466844910827309
16 265513312562851938794103367354849976069

List of values

[0, 9, 221, 11021, 1333349, 225450221, 65155115009, 23520996509141, 12442607161209161, 10464232622576957201, 10056127550296456854221, 13766838616355849433396389, 23142055714094182897602595769, 42789661015360144177667200022669, 94522361182930558488466844910827309, 265513312562851938794103367354849976069]

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

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