38208

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=40A024850
• Theta series of lattice D_3 tensor D_4 (dimension 12, det. 16384, min. norm 4).at n=6A033696
• Number of permutations of floor(i*9/5), i=0..n-1, with all sums of 6 adjacent terms unique.at n=7A152385
• Number of permutations of {1,...,n} avoiding adjacent step pattern up, down, down, up, up, down.at n=8A177540
• Number of n X 6 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 0 0 and 1 1 1 vertically.at n=4A207843
• T(n,k)=Number of nXk 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 0 0 and 1 1 1 vertically.at n=49A207845
• Number of 5 X n 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 0 0 and 1 1 1 vertically.at n=5A207848
• p-INVERT of the odd positive integers, where p(S) = 1 - S - 2 S^2.at n=7A292485