**a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n-k+1), where k = [ n/2 ], s = (composite numbers), t = (odd natural numbers).**

*12, 20, 58, 78, 154, 190, 307, 361, 525, 599, 829, 927, 1235, 1361, 1742, 1898, 2358*

*1 seqfan posts*

Index of A-numbers in seqfan: by ascending order by month by frequency by keyword

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