A123272 Number of primes between consecutive terms of A105575.

1, 1, 1, 0, 0, 1, 1, 0, 0, 0, 1, 0, 1, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 1, 0, 1, 1, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 1, 0, 0, 0

Offset

1,1

Links

Table of n, a(n) for n=1..105.

Formula

a(n) = PrimePi(A105575(n+1)) - PrimePi(A105575(n)) - 1.

Crossrefs

Cf. A105575.

Sequence in context: A258869 A128810 A355946 * A266623 A359579 A246142

Adjacent sequences: A123269 A123270 A123271 * A123273 A123274 A123275

Keyword

easy,nonn

Author

Giovanni Teofilatto, Oct 10 2006

Extensions

Edited and extended by Ray Chandler, Oct 17 2006

Status

approved