25907

Appears in sequences

• Let c(k) denote the k-th composite number and p(k) the k-th prime number; then a(n) = Sum_{i=n*(n-1)/2+1 .. n*(n+1)/2} c(i) - Sum_{i=1..n} p(i).at n=35A024850
• Sort-then-add sequence: a(1) = 316, a(n+1) = a(n) + sort(a(n)).at n=11A033861
• Reversion of x - x^2 + x^5.at n=13A063028
• Sides of integer Heronian triangles [A068967(n), prime(A068967(n)), a(n)] with area A068969(n).at n=23A068968
• Number of permutations of length n which avoid the patterns 1234, 2431, 4213.at n=12A116813
• a(n) = 529*n^2 - 2*n.at n=6A158364
• Number of nX2 0..4 arrays with every row and column nondecreasing rightwards and downwards, and the number of instances of each value within one of each other.at n=32A200984
• Smallest natural number requiring n applications of the map x -> 2^x mod x = A015910(x) to reach 0.at n=11A372707