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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. 3
49288842, 62620221, 116153046, 128221941, 132479727, 443599581, 563581992, 750128651, 1045377417, 1153997472, 1192317546, 1232221059, 1565505534, 1881096741, 2192812511, 2415153276, 2903826159, 3068390847, 3205548534, 3311993184, 3647394275, 3992396232 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..22.

Arkadiusz Wesolowski, Examples of these semimagic squares

Index entries for sequences related to magic squares

CROSSREFS

Cf. A271021, A271022. Subsequence of A269060.

Sequence in context: A017339 A017459 A017591 * A227797 A236947 A080796

Adjacent sequences:  A271017 A271018 A271019 * A271021 A271022 A271023

KEYWORD

nonn

AUTHOR

Arkadiusz Wesolowski, Mar 28 2016

STATUS

approved

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Last modified December 18 19:04 EST 2018. Contains 318243 sequences. (Running on oeis4.)