a(n) = 5*b_5(n)+4, where b_5 lists the indices of zeros of the sequence A261305: u(n) = abs(u(n-1)-gcd(u(n-1),5*n-1)), u(1) = 1.
A186257
a(n) = 5*b_5(n)+4, where b_5 lists the indices of zeros of the sequence A261305: u(n) = abs(u(n-1)-gcd(u(n-1),5*n-1)), u(1) = 1.
Terms
- a(0) =14a(1) =89a(2) =479a(3) =2879a(4) =17099a(5) =99839a(6) =599009a(7) =3592859a(8) =21557099a(9) =129336149a(10) =775914479a(11) =4655486369a(12) =27932918219a(13) =167597509319
External references
- oeis: A186257