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a(n) = smallest magic sum of any 3 X 3 semimagic square which contains exactly n cubes.
5

%I #12 Apr 15 2016 08:16:13

%S 19,16,15,32,73,153,1520,5104,241801435

%N a(n) = smallest magic sum of any 3 X 3 semimagic square which contains exactly n cubes.

%H Multimagic Squares, <a href="http://www.multimagie.com/English/SquaresOfCubes.htm">Magic squares of cubes</a>

%H The Prime Puzzles and Problems Connection, <a href="http://www.primepuzzles.net/puzzles/puzz_412.htm">Puzzle 412</a>

%H Arkadiusz Wesolowski, <a href="/A269231/a269231.txt">Examples of these semimagic squares</a>

%H <a href="/index/Mag#magic">Index entries for sequences related to magic squares</a>

%Y Cf. A268854, A268855, A268856.

%K nonn,fini,hard,more

%O 0,1

%A _Arkadiusz Wesolowski_, Feb 20 2016

%E a(8) from Christian Boyer, added by _Arkadiusz Wesolowski_, Apr 14 2016