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A089617 Number of primes between n^2 and (n+1/7)^2. 0
0, 0, 0, 1, 0, 1, 0, 0, 1, 1, 0, 0, 0, 2, 2, 1, 1, 0, 0, 1, 1, 1, 0, 1, 1, 2, 1, 1, 0, 1, 1, 2, 3, 1, 2, 3, 1, 3, 2, 3, 0, 0, 1, 0, 2, 1, 2, 2, 1, 1, 1, 3, 1, 2, 1, 1, 4, 2, 1, 3, 2, 3, 0, 2, 4, 3, 2, 3, 0, 3, 2, 2, 2, 3, 2, 3, 1, 3, 3, 1, 5, 2, 3, 3, 4, 2, 5, 3, 3, 4, 4, 1, 2, 4, 4, 4, 5, 5, 4, 2, 2, 3, 3, 2, 2 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,14

LINKS

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

PROG

(PARI) pbetweensq2(n) = { for(x=1, n, c=0; for(y=floor(x)^2, (x+1/7)^2, if(isprime(y), c++) ); print1(c", ") ) }

CROSSREFS

Sequence in context: A046751 A124478 A030353 * A274370 A128521 A090477

Adjacent sequences:  A089614 A089615 A089616 * A089618 A089619 A089620

KEYWORD

easy,nonn

AUTHOR

Cino Hilliard, Dec 31 2003

STATUS

approved

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Last modified December 3 16:20 EST 2020. Contains 338906 sequences. (Running on oeis4.)