Binomial coefficients binomial(n,k) = UV such that n>=2k and U > V, where gpf(U) <= k, gpf(V) > k (gpf(n)= is the greatest prime factor of n).
A286981
Binomial coefficients binomial(n,k) = UV such that n>=2k and U > V, where gpf(U) <= k, gpf(V) > k (gpf(n)= is the greatest prime factor of n).
Terms
- a(0) =56a(1) =84a(2) =120a(3) =126a(4) =252a(5) =792a(6) =816a(7) =88560a(8) =98280a(9) =116280a(10) =203490a(11) =695520a(12) =2035800a(13) =177100560a(14) =573166440a(15) =818809200a(16) =2310789600a(17) =8597496600
External references
- oeis: A286981