a(n) is the smallest composite squarefree number k such that (p+n) | (k-1) for every prime p dividing k.

A274445

a(n) is the smallest composite squarefree number k such that (p+n) | (k-1) for every prime p dividing k.

Terms

    a(0) =385a(1) =91a(2) =65a(3) =451a(4) =33a(5) =170171a(6) =145a(7) =1261a(8) =161a(9) =78409a(10) =469a(11) =294061a(12) =649a(13) =13051a(14) =1921a(15) =5251a(16) =721a(17) =8453501a(18) =145a(19) =300243a(20) =1121a(21) =47611a(22) =3601a(23) =1915801a(24) =1057a(25) =41311a(26) =545a(27) =5671a(28) =1261a(29) =19723133

External references