524328domain: NAppears in sequencesa(n) = Sum_{d|n, d odd} d*2^(n/d - 1), a(0)=0.at n=20A054601Bitmaps of king + rook vs. king checkmate patterns on a standard 8 X 8 board.at n=27A362950The smallest term in A061862 with exactly n distinct partitions into a sum of nonnegative powers of its digits.at n=23A388297