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 A160942 a(n)= n * digital sum(n-1) 0
 0, 2, 6, 12, 20, 30, 42, 56, 72, 90, 11, 24, 39, 56, 75, 96, 119, 144, 171, 200, 42, 66, 92, 120, 150, 182, 216, 252, 290, 330, 93, 128, 165, 204, 245, 288, 333, 380, 429, 480, 164, 210, 258, 308, 360, 414, 470, 528, 588, 650, 255, 312, 371, 432, 495, 560, 627, 696 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS a(8)=8xds(7)=8x7=56; a(15)=15xds(14)=15X5=75; a(26)=26xds(25)=26x7=182 LINKS Table of n, a(n) for n=1..58. MATHEMATICA Table[n Total[IntegerDigits[n-1]], {n, 75}] (* Harvey P. Dale, Mar 14 2011 *) CROSSREFS Sequence in context: A077253 A098734 A258881 * A160929 A103505 A279019 Adjacent sequences: A160939 A160940 A160941 * A160943 A160944 A160945 KEYWORD nonn,base AUTHOR Claudio Meller, May 30 2009 STATUS approved

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Last modified May 22 10:24 EDT 2024. Contains 372745 sequences. (Running on oeis4.)