76456

Appears in sequences

• Numbers k such that sigma(k) = 2*phi(k+1).at n=28A068423
• Row sums of A125605.at n=25A125606
• Number of (n+1) X (3+1) 0..3 arrays with the minimum plus the upper median equal to the lower median plus the maximum in every 2 X 2 subblock.at n=6A235888
• Number of (n+1) X (7+1) 0..3 arrays with the minimum plus the upper median equal to the lower median plus the maximum in every 2 X 2 subblock.at n=2A235892
• T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the minimum plus the upper median equal to the lower median plus the maximum in every 2X2 subblock.at n=38A235893
• a(0) = 2, a(1) = 2; for n > 1, a(n) = a(n-1) + 2*a(n-2) + 3.at n=15A290604