162998domain: NAppears in sequencesBinomial transform of A001113.at n=15A126082a(4n+1)=2a(4n), a(4n+2)=2a(4n+1), a(4n+3)=2a(4n+2), a(4n+4)=2a(4n+3)+A007583(n).at n=21A139784