a(n) = 7*b_7(n) + 6, where b_7 lists the indices of zeros of the sequence u(n) = abs(u(n-1) - gcd(u(n-1), 7n-1)), u(1) = 1.
A186259
a(n) = 7*b_7(n) + 6, where b_7 lists the indices of zeros of the sequence u(n) = abs(u(n-1) - gcd(u(n-1), 7n-1)), u(1) = 1.
Terms
- a(0) =20a(1) =167a(2) =797a(3) =6299a(4) =48817a(5) =389437a(6) =3114313a(7) =24910031a(8) =199280101a(9) =1594149787a(10) =12752862247a(11) =102022886167a(12) =816183074713
External references
- oeis: A186259