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Search: id:A128606
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| A128606 |
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Numbers n for which the product of the squares of their digits, not equal to zero, can be divided by n. |
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+0
1
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| 1, 2, 3, 4, 5, 6, 7, 8, 9, 25, 36, 64, 128, 175, 384, 735, 768, 784, 1296, 1764, 2916, 3675, 5625, 7938, 18432, 28672, 34992, 36864, 39366, 46656, 69984, 82944, 96768, 139968, 165375, 236196, 275625, 297675, 354375, 442368, 497664, 524288, 589824, 746496
(list; graph; listen)
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OFFSET
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1,2
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MAPLE
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P:=proc(n) local i, k, w; for i from 1 by 1 to n do w:=1; k:=i; while k>0 do w:=w*(k-(trunc(k/10)*10))^2; k:=trunc(k/10); od; if w>0 then if trunc(w/i)=w/i then print(i); fi; fi; od; end: P(1000000);
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CROSSREFS
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Sequence in context: A096867 A100753 A132416 this_sequence A085123 A131571 A031309
Adjacent sequences: A128603 A128604 A128605 this_sequence A128607 A128608 A128609
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KEYWORD
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nonn,base
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AUTHOR
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Paolo P. Lava & Giorgio Balzarotti (ppl(AT)spl.at), May 08 2007
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