180071domain: NPropertiesPrimalityPrimeyesAppears in sequencesFibonacci sequence beginning 1, 26.at n=20A022396Start with 100016 and repeatedly reverse the digits and add 5 to get the next term.at n=27A119902Number of compositions (ordered partitions) of n into centered pentagonal numbers (A005891).at n=50A322801Prime numbersat n=16348