

A268854


a(n) is the smallest magic sum of any 3 X 3 magic square which contains exactly n triangular numbers.


4




OFFSET

0,1


LINKS

Table of n, a(n) for n=0..7.
Andrew Bremner, On squares of squares II, Acta Arithmetica 99 (2001), pp. 289308.
Multimagic Squares, An unsolved problem
The Prime Puzzles and Problems Connection, Problem 63
The Prime Puzzles and Problems Connection, Puzzle 79
Arkadiusz Wesolowski, Examples of these magic squares
Wikipedia, Magic square
Index entries for sequences related to magic squares


CROSSREFS

Cf. A221669, A268855, A268856, A269231, A271020.
Sequence in context: A196089 A033359 A326791 * A317388 A088344 A268856
Adjacent sequences: A268851 A268852 A268853 * A268855 A268856 A268857


KEYWORD

nonn,fini,hard,more


AUTHOR

Arkadiusz Wesolowski, Feb 14 2016


STATUS

approved



