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A093534
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Square pyramorphic numbers: n such that sum of first n squares (A000330(n)) ends in n.
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1
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1, 5, 25, 40, 65, 80, 160, 225, 385, 400, 560, 625, 785, 800, 960, 1185, 2560, 2625, 4000, 5185, 6560, 6025, 8000, 9185, 9376, 10625, 26560, 37185, 40000, 50625, 66560, 77185, 80000, 90625, 226560, 317185, 400000, 490625, 626560, 717185, 800000
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OFFSET
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1,2
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REFERENCES
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C. A. Pickover, Wonders of Numbers, Chap. 65, Oxford Univ. Press NY 2000; pp. 158-160.
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LINKS
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Table of n, a(n) for n=1..41.
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MATHEMATICA
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l = {}; s = 0; Do[s = s + n^2; If[ Mod[s, 10^Floor[ Log[10, n] + 1]] == n, AppendTo[l, n]], {n, 10^6}]; l (from Robert G. Wilson v May 24 2004)
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CROSSREFS
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A060204 gives the corresponding sums of squares. Cf. A000330.
Sequence in context: A070389 A098993 A099799 * A070388 A056872 A029490
Adjacent sequences: A093531 A093532 A093533 * A093535 A093536 A093537
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KEYWORD
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nonn
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AUTHOR
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Lekraj Beedassy, May 14 2004
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EXTENSIONS
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More terms from Robert G. Wilson v, May 24 2004
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STATUS
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approved
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