239241domain: NAppears in sequencesJuxtapose pairs of primes (starting at 1).at n=26A007794Number of bipartite partitions of ceiling(n/2) white objects and floor(n/2) black ones.at n=23A091437Twin prime pairs concatenated in decimal representation.at n=16A095958Pascal-(1,9,1) array.at n=59A143685Pascal-(1,9,1) array.at n=61A143685