%I A061486
%S A061486 1,2,3,4,5,6,7,8,9,1,3,5,7,9,11,13,15,17,19,2,5,8,11,14,17,20,23,26,29,
%T A061486 3,7,11,15,19,23,27,31,35,39,4,9,14,19,24,29,34,39,44,49,5,11,17,23,29,
%U A061486 35,41,47,53,59,6,13,20,27,34,41,48,55,62,69,7,15,23,31,39,47,55,63,71
%N A061486 Let the number of digits in n be k; a(n) = sum of the products of the 
               digits of n taken r at a time where r ranges from 1 to k.
%e A061486 a(34) = 3 + 4 + 3*4 = 19, a(124) = (1+2+4)+(1*2+2*4+1*4)+(1*2*4) = 29.
%Y A061486 Sequence in context: A101337 A135208 A156207 this_sequence A138470 A112875 
               A113018
%Y A061486 Adjacent sequences: A061483 A061484 A061485 this_sequence A061487 A061488 
               A061489
%K A061486 nonn,base,easy
%O A061486 1,2
%A A061486 Amarnath Murthy (amarnath_murthy(AT)yahoo.com), May 06 2001
%E A061486 More terms from Erich Friedman (efriedma(AT)stetson.edu), Jun 03 2001