55796

Appears in sequences

• Number of triangles in an n X n grid of squares with diagonals.at n=26A100583
• Number of permutations p of {1,...,n} such that exactly one element of {p(1),...,p(i-1)} is between p(i) and p(i+1) for all i from 2 to n-1.at n=20A185030
• Number of (n+2) X (7+2) 0..1 arrays with no 3 x 3 subblock diagonal sum 0 and no antidiagonal sum 3 and no row sum 1 and no column sum 1.at n=22A257446
• Magic sums of 4 X 4 magic squares composed of odd squares.at n=36A271582
• Numbers k whose abundance is 128: sigma(k) - 2*k = 128.at n=5A292626
• Primitive abundant numbers version 2 (abundant numbers all of whose proper divisors are deficient numbers) and increasing any prime factor in the prime factorization gives a non-abundant number when factored back.at n=40A335557
• Primitive nondeficient numbers satisfying a stronger condition that compares abundancy with related numbers as detailed in the comments.at n=23A352739