Least k > 0 such that gcd(k^n+7,(k+1)^n+7) > 1, or 0 if there is no such k.

Terms

a(0) =1a(1) =0a(2) =14a(3) =320a(4) =56a(5) =675113a(6) =224a(7) =13a(8) =5a(9) =283a(10) =33a(11) =192a(12) =26a(13) =242a(14) =5a(15) =2a(16) =10a(17) =140a(18) =5a(19) =50a(20) =142a(21) =29a(22) =18a(23) =605962a(24) =11a(25) =97a(26) =234881024a(27) =951a(28) =5a(29) =3332537854