191609domain: NAppears in sequencesWrite (sqrt(5)-1)/2 as a binary fraction; read this from left to right and whenever a 1 appears, note the integer formed by reading leftwards from that 1.at n=10A099971Number of n X 3 0..1 arrays with rows, columns and antidiagonals unimodal and diagonals nondecreasing.at n=20A223765