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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.

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A375459 a(n) = smallest magic sum of any 3 X 3 magic square which contains exactly n squared primes, or 0 if no such magic square exists.

Original entry on oeis.org

21, 18, 15, 51, 195, 435, 76035
Offset: 0

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Author

Arkadiusz Wesolowski, Aug 15 2024

Keywords

Comments

a(9) = 0.
a(n) = A268855(n+1) for n = 0, 1, 2, and 5.
a(7) and a(8) - if nonzero, they are greater than 10^10.

Links

Crossrefs

Cf. A001248, A268855, A375361.
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Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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