A number triangle related to the central binomial coefficients.

Terms

a(0) =1a(1) =2a(2) =2a(3) =6a(4) =4a(5) =4a(6) =20a(7) =12a(8) =8a(9) =8a(10) =70a(11) =40a(12) =24a(13) =16a(14) =16a(15) =252a(16) =140a(17) =80a(18) =48a(19) =32a(20) =32a(21) =924a(22) =504a(23) =280a(24) =160a(25) =96a(26) =64a(27) =64a(28) =3432a(29) =1848