67266

Appears in sequences

• Coordination sequence for root lattice B_9.at n=3A022151
• Numbers k such that sigma(reverse(k)) = sigma(reverse(k-1)) + sigma(reverse(k-2)).at n=22A069970
• a(n)=Sum_{j = 0..n} binomial(phi(n),phi(j)).at n=16A073317
• Numbers in A075728 which are not one less than some prime.at n=35A179232
• Number of nondecreasing -n..n vectors of length 3 whose dot product with some other -n..n vector equals 3.at n=37A226342
• Number of (n+2)X(4+2) 0..1 arrays with every 3X3 subblock sum of the two sums of the diagonal and antidiagonal minus the two minimums of the central column and central row nondecreasing horizontally, vertically and ne-to-sw antidiagonally.at n=4A254903
• T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with every 3X3 subblock sum of the two sums of the diagonal and antidiagonal minus the two minimums of the central column and central row nondecreasing horizontally, vertically and ne-to-sw antidiagonally.at n=32A254907
• Number of (5+2)X(n+2) 0..1 arrays with every 3X3 subblock sum of the two sums of the diagonal and antidiagonal minus the two minimums of the central column and central row nondecreasing horizontally, vertically and ne-to-sw antidiagonally.at n=3A254911