80524

Appears in sequences

• Number of 2's in all partitions of n.at n=39A024786
• Number of occurrences of smallest prime factor in all partitions of n-th composite number: a(n)=A066633(A002808(n), A056608(n)).at n=26A091109
• Number of 5-step left-handed knight's tours (moves only out two, left one) on an n X n board summed over all starting positions.at n=32A187175
• Number of simple unlabeled graphs on 2*n nodes with exactly n connected components that are trees or cycles.at n=15A215979
• Solution of the complementary equation a(n) = a(n-1) + a(n-2) + b(n-1) + n + 1, where a(0) = 1, a(1) = 2, b(0) = 3, and (a(n)) and (b(n)) are increasing complementary sequences.at n=19A294549