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Search: id:A047912
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| A047912 |
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a(n+1) = a(n) * sum of digits of a(n). |
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+0
2
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| 3, 9, 81, 729, 13122, 118098, 3188646, 114791256, 4132485216, 148769467776, 10711401679872, 578415690713088, 41645929731342336, 2998506940656648192, 296852187125008171008, 24045027157125661851648
(list; graph; listen)
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OFFSET
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3,1
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MAPLE
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P:=proc(n) local a, i, k, w; a:=3; print(a); for i from 1 by 1 to n do w:=0; k:=a; while k>0 do w:=w+k-(trunc(k/10)*10); k:=trunc(k/10); od; a:=a*w; print(a); od; end: P(1000); - Paolo P. Lava (ppl(AT)spl.at), Apr 27 2007
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CROSSREFS
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Cf. A047892.
Adjacent sequences: A047909 A047910 A047911 this_sequence A047913 A047914 A047915
Sequence in context: A124049 A067623 A055156 this_sequence A078684 A121858 A032108
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KEYWORD
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easy,nice,nonn
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AUTHOR
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Miklos SZABO (mike(AT)ludens.elte.hu)
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