a(n) is the smallest k such that number of non-unitary prime divisors of central binomial coefficient, A000984(k) = C(2*k,k) equals n.

A081393

a(n) is the smallest k such that number of non-unitary prime divisors of central binomial coefficient, A000984(k) = C(2*k,k) equals n.

Terms

    a(0) =1a(1) =3a(2) =5a(3) =14a(4) =48a(5) =74a(6) =182a(7) =314a(8) =480a(9) =774a(10) =960a(11) =1321a(12) =1323a(13) =1670a(14) =3121a(15) =3455a(16) =3457a(17) =3472a(18) =3462a(19) =3469a(20) =8203a(21) =9991a(22) =12163a(23) =15838a(24) =15840a(25) =17665a(26) =18480a(27) =18482a(28) =19458a(29) =19464

External references