id:A139762 - OEIS Search Results

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a(n)=Sum_digits_of_a(n-1)+Sum_digits_of(n).

+0
1

0, 1, 3, 6, 10, 6, 12, 10, 9, 18, 10, 3, 6, 10, 6, 12, 10, 9, 18, 19, 12, 6, 10, 6, 12, 10, 9, 18, 19, 21, 6, 10, 6, 12, 10, 9, 18, 19, 21, 15, 10, 6, 12, 10, 9, 18, 19, 21, 15, 19, 15, 12, 10, 9, 18, 19, 21, 15, 19, 24, 12, 10, 9, 18, 19, 21, 15, 19, 24, 21, 10, 9, 18, 19, 21, 15, 19 (list; graph; listen)

	OFFSET	`0,3`
	MAPLE	`P:=proc(n) local a, i, k, w, x; a:=0; print(a); for i from 1 by 1 to n do w:=0; k:=i; while k>0 do w:=w+k-(trunc(k/10)10); k:=trunc(k/10); od; x:=0; k:=a; while k>0 do x:=x+k-(trunc(k/10)10); k:=trunc(k/10); od; a:=w+x; print(a); od; end: P(101);`
	CROSSREFS	`Sequence in context: A065234 A082184 A080817 this_sequence A055262 A138797 A009019` `Adjacent sequences: A139759 A139760 A139761 this_sequence A139763 A139764 A139765`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paolo P. Lava & Giorgio Balzarotti (ppl(AT)spl.at), May 20 2008`

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Last modified March 13 16:35 EST 2010. Contains 173425 sequences.

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