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A097569
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Right-truncatable Harshad numbers (zeros not permitted).
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2
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1, 2, 3, 4, 5, 6, 7, 8, 9, 12, 18, 21, 24, 27, 36, 42, 45, 48, 54, 63, 72, 81, 84, 126, 216, 243, 247, 364, 423, 481, 486, 846, 2478, 8463, 24786
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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COMMENTS
| Harshad numbers in which repeatedly deleting the rightmost digit gives a Harshad at every step until a single digit Harshad remains. Sequence is finite with 24786 being the last term.
24786 can be proved to be the last term by a genetic approach (constructing the whole tree). - C. Rivera (crivera(AT)primepuzzles.net), Sep 19 2004
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CROSSREFS
| Cf. A005349.
Sequence in context: A193455 A114440 A097518 * A095160 A200372 A059043
Adjacent sequences: A097566 A097567 A097568 * A097570 A097571 A097572
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KEYWORD
| base,nonn,fini,full
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AUTHOR
| Jason Earls (zevi_35711(AT)yahoo.com), Aug 28 2004
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