Triangular array in which k-th entry in n-th row is C([ (n+k)/2 ],k) (1<=k<=n).

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =1a(5) =1a(6) =2a(7) =3a(8) =1a(9) =1a(10) =3a(11) =3a(12) =4a(13) =1a(14) =1a(15) =3a(16) =6a(17) =4a(18) =5a(19) =1a(20) =1a(21) =4a(22) =6a(23) =10a(24) =5a(25) =6a(26) =1a(27) =1a(28) =4a(29) =10