Numbers k such that the k-th Catalan number C(2k, k)/(k + 1) is divisible by k/2 but not divisible by k.

A120622

Numbers k such that the k-th Catalan number C(2k, k)/(k + 1) is divisible by k/2 but not divisible by k.

Terms

    a(0) =4a(1) =24a(2) =40a(3) =72a(4) =304a(5) =480a(6) =560a(7) =1032a(8) =1248a(9) =1376a(10) =1440a(11) =1632a(12) =1696a(13) =2128a(14) =2320a(15) =2400a(16) =2576a(17) =2720a(18) =3360a(19) =3520a(20) =4104a(21) =4176a(22) =4240a(23) =4320a(24) =4368a(25) =4704a(26) =4896a(27) =5056a(28) =5280a(29) =5568

External references