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%I #15 Apr 29 2016 11:23:30
%S 11,20,27,47,45,90,16,180,134,76,89,115,396,184,135,245,471,405,825,
%T 124,1001,220,874,769,405,15,944,1671,1320,45,1309,2410,1365,876,280,
%U 2446,5460,1519,310,1485,680,855,795,481,6440,3640,1680,2416,155,6525,4455,585,4459
%N Absolute value of first differences of A038552, divided by 24.
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/ClassNumber.html">Class Number</a>
%F a(n) = abs(A038552(n+1)-A038552(n))/24.
%Y Cf. A038552.
%K nonn
%O 1,1
%A Robert Brewer (rbrewerjr(AT)aol.com)
%E Corrected and extended by _Michel Marcus_, Apr 29 2016
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