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A269060 Magic sums of 3 X 3 semimagic squares composed of positive triangular numbers.

%I A269060 #9 Jan 15 2025 16:42:26
%S A269060 711,1251,1712,2132,2616,2812,2934,3357,3441,3781,3812,4156,4288,4842,
%T A269060 4971,4972,5346,5382,5659,5842,5886,6147,6159,6402,6734,7062,7312,
%U A269060 7403,7592,7722,8034,8342,8831,8862,8961,9092,9117,9496,9987,10066,10261,10341
%N A269060 Magic sums of 3 X 3 semimagic squares composed of positive triangular numbers.
%H A269060 Wikipedia, <a href="https://en.wikipedia.org/wiki/Triangular_number">Triangular number</a>.
%H A269060 <a href="/index/Mag#magic">Index entries for sequences related to magic squares</a>
%e A269060 A semimagic square with sum 711:
%e A269060   |----|----|----|
%e A269060   | 15 | 66 |630 |
%e A269060   |----|----|----|
%e A269060   |231 |435 | 45 |
%e A269060   |----|----|----|
%e A269060   |465 |210 | 36 |
%e A269060   |----|----|----|
%Y A269060 Subsequence of A265197 and A269062.
%Y A269060 Cf. A000217, A265141, A269061.
%K A269060 nonn
%O A269060 1,1
%A A269060 _Arkadiusz Wesolowski_, Feb 18 2016