67880

Appears in sequences

• Number of nonempty subsets of {1,2,...,n} in which exactly 4/5 of the elements are <= (n-4)/2.at n=27A048068
• Numbers n such that there is both a square and a triangular number strictly between n^3 and n^3+n.at n=1A246042
• Number of (n+2)X(7+2) 0..1 arrays with every 3X3 subblock sum of the two medians of the central row and column plus the two sums of the diagonal and antidiagonal nondecreasing horizontally, vertically and ne-to-sw antidiagonally.at n=22A259005