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A047899
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a(n+1) = a(n) * sum of digits of a(n).
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0
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7, 49, 637, 10192, 132496, 3312400, 43061200, 688979200, 33759980800, 1755519001600, 70220760064000, 2387505842176000, 138475338846208000, 9693273719234560000, 736688802661826560000, 64828614634240737280000
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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MAPLE
| P:=proc(n) local a, i, k, w; a:=7; 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 (paoloplava(AT)gmail.com), Apr 27 2007
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CROSSREFS
| Cf. A047892.
Sequence in context: A125796 A135745 A080895 * A061585 A067214 A202782
Adjacent sequences: A047896 A047897 A047898 * A047900 A047901 A047902
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KEYWORD
| nonn,base,easy
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AUTHOR
| Miklos SZABO (mike(AT)ludens.elte.hu)
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