72028

Appears in sequences

• A triangular array of numbers related to factorization and number of parts in Murasaki diagrams.at n=60A133611
• The real part of complex sequence: a(n) = a(n-1) + (1+i)*a(n-2).at n=23A143055
• Number of 4-step E, S, NW and NE-moving king's tours on an n X n board summed over all starting positions.at n=36A187587
• Number of nonnegative integer arrays of length n+4 with new values 0 upwards introduced in order, and containing the value 4.at n=5A211558
• T(n,k) = number of nonnegative integer arrays of length n+k-1 with new values 0 upwards introduced in order, and containing the value k-1.at n=50A211561
• Number of nonnegative integer arrays of length n+5 with new values 0 upwards introduced in order, and containing the value n-1.at n=4A211565
• a(n) = Sum_{-n<i<n, -n<j<n, gcd{i,j}=3} (n-|i|)*(n-|j|).at n=31A331774