id:A061486 - OEIS Search Results

Search: id:A061486

Displaying 1-1 of 1 results found.

page 1

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.

+0
2

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, 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, 35, 41, 47, 53, 59, 6, 13, 20, 27, 34, 41, 48, 55, 62, 69, 7, 15, 23, 31, 39, 47, 55, 63, 71 (list; graph; listen)

	OFFSET	`1,2`
	EXAMPLE	`a(34) = 3 + 4 + 34 = 19, a(124) = (1+2+4)+(12+24+14)+(124) = 29.`
	CROSSREFS	`Sequence in context: A101337 A135208 A156207 this_sequence A138470 A112875 A113018` `Adjacent sequences: A061483 A061484 A061485 this_sequence A061487 A061488 A061489`
	KEYWORD	`nonn,base,easy`
	AUTHOR	`Amarnath Murthy (amarnath_murthy(AT)yahoo.com), May 06 2001`
	EXTENSIONS	`More terms from Erich Friedman (efriedma(AT)stetson.edu), Jun 03 2001`

page 1

Search completed in 0.002 seconds

Last modified December 4 23:11 EST 2009. Contains 170347 sequences.

AT&T Labs Research