11364373domain: NPropertiesPrimalityPrimeyesAppears in sequencesNumber of set partitions of [n] having exactly seven pairs (m,m+1) such that m is in some block b and m+1 is in block b+1.at n=7A271794Number of set partitions of [2n] having exactly n pairs (m,m+1) such that m is in some block b and m+1 is in block b+1.at n=7A271841Prime numbersat n=748956