a(n) is the number of pair of consecutive numbers (k,k+1) with k<=10^n such that k and k+1 are both squarefree.
A087618
a(n) is the number of pair of consecutive numbers (k,k+1) with k<=10^n such that k and k+1 are both squarefree.
Terms
- a(0) =1a(1) =5a(2) =33a(3) =323a(4) =3230a(5) =32269a(6) =322619a(7) =3226343a(8) =32263377a(9) =322634281a(10) =3226340896a(11) =32263409594a(12) =322634100659
External references
- oeis: A087618