Numbers k such that the number of prime divisors of the k-th Catalan number (counted with multiplicity) divides k.

A121612

Numbers k such that the number of prime divisors of the k-th Catalan number (counted with multiplicity) divides k.

Terms

    a(0) =2a(1) =3a(2) =4a(3) =8a(4) =10a(5) =12a(6) =16a(7) =20a(8) =22a(9) =117a(10) =408a(11) =432a(12) =444a(13) =492a(14) =504a(15) =508a(16) =1555a(17) =1560a(18) =1605a(19) =1675a(20) =1790a(21) =5832a(22) =5940a(23) =5976a(24) =6048a(25) =6078a(26) =6102a(27) =6108a(28) =6132a(29) =6138

External references