

A268856


a(n) = smallest magic sum of any 3 X 3 magic square which contains exactly n numbers that are triangular or square.


4




OFFSET

0,1


COMMENTS

a(8) and a(9) are greater than 10^10.  Arkadiusz Wesolowski, Oct 27 2018


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, Home Page
The Prime Puzzles and Problems Connection, Problem 63
Arkadiusz Wesolowski, Examples of these magic squares
Wikipedia, Magic square
Index entries for sequences related to magic squares


CROSSREFS

Cf. A268854, A268855, A269231.
Sequence in context: A268854 A317388 A088344 * A273597 A022995 A023481
Adjacent sequences: A268853 A268854 A268855 * A268857 A268858 A268859


KEYWORD

nonn,fini,hard,more


AUTHOR

Arkadiusz Wesolowski, Feb 14 2016


STATUS

approved



