Sequence related to Hankel transform of super-ballot numbers.

Terms

a(0) =1a(1) =35a(2) =84a(3) =165a(4) =286a(5) =455a(6) =680a(7) =969a(8) =1330a(9) =1771a(10) =2300a(11) =2925a(12) =3654a(13) =4495a(14) =5456a(15) =6545a(16) =7770a(17) =9139a(18) =10660a(19) =12341a(20) =14190a(21) =16215a(22) =18424a(23) =20825a(24) =23426a(25) =26235a(26) =29260a(27) =32509a(28) =35990a(29) =39711