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 A098734 Consider the sequence {b(n), n >= 1} of digits of the integers: 0 1 2 3 4 5 6 7 8 9 1 0 1 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 2 0... (A033307); a(n) = n*b(n). 1

%I #4 Mar 31 2012 14:11:36

%S 0,2,6,12,20,30,42,56,72,90,11,0,13,14,15,32,17,54,19,80,21,110,23,

%T 144,25,182,27,224,29,270,62,0,66,34,70,72,74,114,78,160,82,210,86,

%U 264,90,322,94,384,98,450,153,0,159,54,165,112,171,174,177,240,183,310,189,384

%N Consider the sequence {b(n), n >= 1} of digits of the integers: 0 1 2 3 4 5 6 7 8 9 1 0 1 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 2 0... (A033307); a(n) = n*b(n).

%Y Cf. A098727, etc.

%K base,easy,nonn

%O 1,2

%A _Alexandre Wajnberg_, Sep 30 2004

%E More terms from _Emeric Deutsch_, Jul 13 2005

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Last modified May 27 01:50 EDT 2024. Contains 372847 sequences. (Running on oeis4.)