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A066702
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Square numbers whose reverse is triangular.
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3
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0, 1, 1306449, 1044000721, 12957041241, 1019072079081, 1174279984164, 6454272356676, 65036563475625, 67624587155889, 123826990849454025
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OFFSET
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0,3
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COMMENTS
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The referred to triangles are A066703. - Robert G. Wilson v.
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LINKS
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Table of n, a(n) for n=0..10.
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EXAMPLE
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9446031 is triangular and 1306449 is a square.
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MATHEMATICA
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lst = {0}; For[i = 1, i > 0, i++, s = i^2; t = FromDigits@ Reverse@ IntegerDigits@ s; If[ IntegerQ@ Sqrt[8 t + 1] && Mod[s, 10] > 0, AppendTo[lst, s]; Print@ lst]]
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CROSSREFS
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Cf. A181412. - Harvey P. Dale, Jan 30 2011
Sequence in context: A053084 A204537 A186138 * A141592 A116495 A179584
Adjacent sequences: A066699 A066700 A066701 * A066703 A066704 A066705
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KEYWORD
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base,more,nonn
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AUTHOR
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Erich Friedman, Jan 14 2002
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STATUS
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approved
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