52051domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes of the form 47*n^2 - 1701*n + 10181.at n=28A128878Number of lower triangular n X n arrays colored with integers 0 upwards introduced in row major order, with no element equal to any horizontal or vertical neighbor, and containing the value n(n+1)/2-2.at n=24A211905Prime numbersat n=5323