28868

Appears in sequences

• Number of ordered 5-tuples of integers from [ 1,n ] with no common factors among pairs.at n=39A015663
• Sum of binomial numbers A000332(k+3), with k in the reduced residue system modulo n.at n=20A192000
• Sum_{0<j<k<=n} P(k)-P(j), where P(j)=A065091(j) is the j-th odd prime.at n=32A206803
• Number of (n+2)X(5+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=10A259003
• Least nonnegative integer which requires n letters to spell in Turkish excluding spaces and hyphens.at n=30A305100