Numbers k such that exactly three d in the range d <= k/2 exist which divide binomial(k-d-1,d-1) and which are not coprime to k.
A178099
Numbers k such that exactly three d in the range d <= k/2 exist which divide binomial(k-d-1,d-1) and which are not coprime to k.
Terms
- a(0) =32a(1) =38a(2) =45a(3) =51a(4) =52a(5) =56a(6) =57a(7) =63a(8) =69a(9) =87a(10) =145a(11) =209a(12) =713a(13) =1073a(14) =3233a(15) =3953a(16) =5609a(17) =8633a(18) =11009a(19) =18209a(20) =23393a(21) =31313a(22) =38009a(23) =56153a(24) =71273a(25) =74513a(26) =131753a(27) =154433a(28) =164009a(29) =189209
External references
- oeis: A178099