a(n)=12*sum(1<=i<=j<=k<=n,i*j/k).
0, 12, 54, 154, 349, 685, 1217, 2009, 3134, 4674, 6720, 9372, 12739, 16939, 22099
2 seqfan posts
Thu Jan 1 20:44:56 CET 2009 [seqfan] Re: Christmas joke Sequences?
Thu Jan 1 07:32:55 CET 2009 [seqfan] Re: Christmas joke Sequences?
Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword
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