87901

Appears in sequences

• Strong pseudoprimes to base 58.at n=33A020284
• Number of scalene triangles, distinct up to congruence, on an n X n grid (or geoboard).at n=26A190313
• Number of n X 5 0..1 arrays with every element equal to 1, 2, 3, 4 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.at n=3A302950
• T(n,k) = Number of n X k 0..1 arrays with every element equal to 1, 2, 3, 4 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.at n=31A302953
• Number of 4Xn 0..1 arrays with every element equal to 1, 2, 3, 4 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.at n=4A302955