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.

1, 5, 33, 323, 3230, 32269, 322619, 3226343, 32263377, 322634281, 3226340896, 32263409594, 322634100659, 3226340989192

Offset: 0

Author

Eric W. Weisstein, Sep 19 2003

Keywords

• nonn
• more

Links

• Eric Weisstein's World of Mathematics, Squarefree

Crossrefs

Cf. A071172, A065474.

Formula

Asymptotic density is A065474.

Extensions

a(11)-a(13) from Donovan Johnson, Jun 26 2010