772364093domain: NPropertiesPrimalityPrimeyesAppears in sequencesQ-residue of the (n+1)st Fibonacci polynomial, where Q is the triangular array (t(i,j)) given by t(i,j)=1. (See Comments.)at n=23A193649Number of n-step walks from a universal vertex to the other on the diamond graph.at n=23A344236Prime numbersat n=39796620