cp's OEIS Frontend

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.

Showing 1-2 of 2 results.

A269324 Magic sums of 3 X 3 magic squares composed of primes in an arithmetic progression.

Original entry on oeis.org

3117, 3747, 13017, 21309, 28209, 35097, 39099, 39189, 42663, 46923, 52977, 69501, 71061, 73239, 83211, 87663, 88041, 96171, 100767, 104613, 108033, 111831, 112899, 113691, 114159, 117483, 123567, 129939, 135699, 136239, 139917, 141807, 141909, 149241
Offset: 1

Views

Author

Arkadiusz Wesolowski, Feb 23 2016

Keywords

References

  • Joseph S. Madachy, "Magic and Antimagic Squares." Ch. 4 in Madachy's Mathematical Recreations, New York: Dover, 1979, p. 95.

Links

Crossrefs

Cf. A269325. Subsequence of A268790.

A269905 Smallest of n^2 primes in an arithmetic progression that form an n X n magic square with the least magic sum, or 0 if no such magic square exists.

Original entry on oeis.org

2, 0, 199, 53297929
Offset: 1

Views

Author

Arkadiusz Wesolowski, Mar 07 2016

Keywords

Comments

a(n) > 0 for every n >= 3 under Dickson's conjecture.

Links

Crossrefs

Cf. A113827, A269325, A269904.
Showing 1-2 of 2 results.

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

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