|
Search: id:A047899
|
|
|
| A047899 |
|
a(n+1) = a(n) * sum of digits of a(n). |
|
+0
1
|
|
| 7, 49, 637, 10192, 132496, 3312400, 43061200, 688979200, 33759980800, 1755519001600, 70220760064000, 2387505842176000, 138475338846208000, 9693273719234560000, 736688802661826560000, 64828614634240737280000
(list; graph; listen)
|
|
|
OFFSET
|
7,1
|
|
|
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 (ppl(AT)spl.at), Apr 27 2007
|
|
CROSSREFS
|
Cf. A047892.
Sequence in context: A125796 A135745 A080895 this_sequence A061585 A067214 A069032
Adjacent sequences: A047896 A047897 A047898 this_sequence A047900 A047901 A047902
|
|
KEYWORD
|
easy,nonn
|
|
AUTHOR
|
Miklos SZABO (mike(AT)ludens.elte.hu)
|
|
|
Search completed in 0.002 seconds
|
