245627domain: NPropertiesPrimalityPrimeyesAppears in sequencesNumber of connected trivalent bipartite graphs with 2n nodes.at n=10A006823Primes p such that 2^j+p^j are primes for j=0,1,4,16.at n=15A094492Number of n X 3 0..1 arrays with rows, columns and antidiagonals unimodal and diagonals nondecreasing.at n=21A223765Prime numbersat n=21682