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%I #1 May 16 2003 03:00:00
%S 1,4,5,6,8,9,10,11,13,14,15,16,17,19,20,21,22,23,24,25,27,28,29,30,31,
%T 32,33,34,36,37,38,39,40,41,42,43,44,46,47,48,49,50,51,52,53,54,55,57,
%U 58,59,60,61,62,63,64,65,66,67,68,70,71,72,73,74,75,76,77,78,79,80,81
%N First differences of A061577.
%Y Cf. A005228, A061577.
%K nonn,easy
%O 1,2
%A Ronald van Eijck (eequalsmcsquare(AT)hotmail.com), May 21 2001
%E More terms from Larry Reeves (larryr(AT)acm.org), Jun 12 2001
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