352813domain: NPropertiesPrimalityPrimeyesAppears in sequencesTrueSoFar terminating terms in other bases.at n=23A102843Number of (n+1) X (7+1) 0..1 arrays with each 2 X 2 subblock having clockwise pattern 0000 0011 or 0101.at n=15A259221Prime numbersat n=30198