a(n) = sum_{i=1..n} {last digit of prime(i)}.
2, 5, 10, 17, 18, 21, 28, 37, 40, 49, 50, 57, 58, 61, 68, 71, 80, 81, 88, 89, 92, 101, 104
2 seqfan posts
Sun Jan 16 03:53:34 CET 2011 [seqfan] Re: Somebody knows this conjecture?
Sat Jan 15 05:54:32 CET 2011 [seqfan] Re: Somebody knows this conjecture?
Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword
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