

A093534


Square pyramorphic numbers: n such that sum of first n squares (A000330(n)) ends in n.


1



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
(list;
graph;
refs;
listen;
history;
text;
internal format)



OFFSET

1,2


REFERENCES

C. A. Pickover, Wonders of Numbers, Chap. 65, Oxford Univ. Press NY 2000; pp. 158160.


LINKS

Table of n, a(n) for n=1..41.


MATHEMATICA

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)


CROSSREFS

A060204 gives the corresponding sums of squares. Cf. A000330.
Sequence in context: A070389 A098993 A099799 * A070388 A250314 A056872
Adjacent sequences: A093531 A093532 A093533 * A093535 A093536 A093537


KEYWORD

nonn


AUTHOR

Lekraj Beedassy, May 14 2004


EXTENSIONS

More terms from Robert G. Wilson v, May 24 2004


STATUS

approved



