A trisection of A001405 (central binomial coefficients): binomial(3n+1,floor((3n+1)/2)), n >= 0.

A187443

A trisection of A001405 (central binomial coefficients): binomial(3n+1,floor((3n+1)/2)), n >= 0.

Terms

    a(0) =1a(1) =6a(2) =35a(3) =252a(4) =1716a(5) =12870a(6) =92378a(7) =705432a(8) =5200300a(9) =40116600a(10) =300540195a(11) =2333606220a(12) =17672631900a(13) =137846528820

External references