1188679domain: NPropertiesPrimalityPrimeyesAppears in sequencesExpansion of (2/(3*sqrt(1-4*z)-1+4*z))*((1-sqrt(1-4*z))/(2*z))^k with k=10.at n=8A172067Number of ways to place n non-attacking bishops on a 2 X 2n board.at n=8A199033Number of 4 X n 0..1 arrays with rows unimodal and columns nondecreasing.at n=17A225011Prime numbersat n=92132