a(n) = A255502(n)/2.A256030a(n) = A255502(n)/2.Terms a(0) =1a(1) =2a(2) =7a(3) =23a(4) =76a(5) =250a(6) =824a(7) =2753a(8) =9190a(9) =30756a(10) =103014a(11) =345563External referencesoeis: A256030