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A117053
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Enneagonal numbers for which both the sum of the digits and the product of the digits are also enneagonal numbers.
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0
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0, 1, 9, 1350, 10071, 39804, 46806, 66309, 80484, 175056, 204369, 226950, 235950, 260169, 305916, 450186, 460284, 473064, 556206, 570246, 581604, 676500, 704481, 733029, 822075, 835701, 930606, 1015476, 1065084, 1155750, 1208634, 1305096
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,3
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EXAMPLE
| 39804 is in the sequence because (1) it is an enneagonal number,(2)the sum of its digits 3+9+8+0+4=24 is an enneagonal number and (3)the product of its digits 3*9*8*0*4=0 is also an enneagonal number.
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CROSSREFS
| Cf. A001106.
Sequence in context: A202981 A020261 A076442 * A120347 A203649 A187131
Adjacent sequences: A117050 A117051 A117052 * A117054 A117055 A117056
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KEYWORD
| base,nonn
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AUTHOR
| Luc Stevens (lms022(AT)yahoo.com), Apr 15 2006
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