A271020 - OEIS

A271020

Magic sums of 3 X 3 semimagic squares of triangular numbers whose rows, columns, and at least one of the two main diagonals sum to the same number.

%I #7 Apr 05 2016 00:20:00

%S 49288842,62620221,116153046,128221941,132479727,443599581,563581992,

%T 750128651,1045377417,1153997472,1192317546,1232221059,1565505534,

%U 1881096741,2192812511,2415153276,2903826159,3068390847,3205548534,3311993184,3647394275,3992396232

%N Magic sums of 3 X 3 semimagic squares of triangular numbers whose rows, columns, and at least one of the two main diagonals sum to the same number.

%H Arkadiusz Wesolowski, <a href="/A271020/a271020.txt">Examples of these semimagic squares</a>

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

%Y Cf. A271021, A271022. Subsequence of A269060.

%K nonn

%O 1,1

%A _Arkadiusz Wesolowski_, Mar 28 2016