A Chebyshev transform of the central Delannoy numbers.

Terms

a(0) =1a(1) =3a(2) =12a(3) =57a(4) =283a(5) =1440a(6) =7461a(7) =39159a(8) =207492a(9) =1107549a(10) =5946543a(11) =32080032a(12) =173748913a(13) =944185827a(14) =5145534876a(15) =28110823401a(16) =153904324315a(17) =844210620000