Central terms of triangle A102363.

Terms

a(0) =1a(1) =5a(2) =21a(3) =86a(4) =349a(5) =1410a(6) =5682a(7) =22860a(8) =91869a(9) =368906a(10) =1480486a(11) =5938740a(12) =23813746a(13) =95462996a(14) =382594884a(15) =1533053976a(16) =6141910749a(17) =24603000666a(18) =98541647454a(19) =394644228516