Numbers n which are neither a prime nor a square of a prime such that there is no d, 2<=d<=n/2, which divides binomial(n-d-1,d-1) and is not coprime to n.
A269135
Numbers n which are neither a prime nor a square of a prime such that there is no d, 2<=d<=n/2, which divides binomial(n-d-1,d-1) and is not coprime to n.
Terms
- a(0) =1a(1) =6a(2) =8a(3) =10a(4) =12a(5) =15a(6) =20a(7) =21a(8) =24a(9) =33a(10) =35a(11) =143a(12) =323a(13) =899a(14) =1763a(15) =3599a(16) =5183a(17) =10403a(18) =11663a(19) =19043a(20) =22499a(21) =32399a(22) =36863a(23) =39203a(24) =51983a(25) =57599a(26) =72899a(27) =79523a(28) =97343a(29) =121103
External references
- oeis: A269135