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Search: id:A047900
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| A047900 |
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a(n+1) = a(n) * sum of digits of a(n). |
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+0
3
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| 8, 64, 640, 6400, 64000, 640000, 6400000, 64000000, 640000000, 6400000000, 64000000000, 640000000000, 6400000000000, 64000000000000, 640000000000000, 6400000000000000, 64000000000000000, 640000000000000000
(list; graph; listen)
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OFFSET
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7,1
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COMMENT
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After the 2nd element, every element has the same beginning. a(3+k) = 10 * a(2+k)
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MAPLE
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P:=proc(n) local a, i, k, w; a:=8; 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.
Sequence in context: A074113 A074116 A033144 this_sequence A088038 A061435 A133054
Adjacent sequences: A047897 A047898 A047899 this_sequence A047901 A047902 A047903
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KEYWORD
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easy,nonn
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AUTHOR
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Miklos SZABO (mike(AT)ludens.elte.hu)
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