61454

Appears in sequences

• Numbers n such that n-th prime - phi(n) - d(n) = (n+1)-th prime - phi(n+1) - d(n+1), where d(n) = number of divisors of n.at n=10A063690
• Row sums of triangle A097094 and also equals the self-convolution of A097097 (antidiagonal sums of triangle A097094).at n=19A097096
• Bond series for first parallel moment of 4.8 (bathroom tile) lattice.at n=24A120554
• Number of nXn 0..1 arrays with every element unequal to 0, 1, 2, 6, 7 or 8 king-move adjacent elements, with upper left element zero.at n=6A316687
• Number of n X 7 0..1 arrays with every element unequal to 0, 1, 2, 6, 7 or 8 king-move adjacent elements, with upper left element zero.at n=6A316692