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A061399
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Number of non-squarefree integers between primes p(n) and p(n+1).
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4
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0, 1, 0, 2, 1, 1, 1, 1, 4, 0, 2, 1, 0, 2, 4, 2, 1, 2, 1, 1, 2, 2, 2, 3, 3, 0, 1, 1, 1, 7, 1, 3, 0, 4, 1, 3, 2, 1, 4, 2, 1, 3, 1, 1, 1, 4, 3, 2, 1, 1, 2, 1, 6, 2, 2, 2, 1, 3, 2, 0, 4, 6, 1, 1, 2, 4, 3, 5, 1, 3, 1, 4, 3, 3, 1, 3, 2, 1, 3, 3, 1, 4, 1, 1, 2, 2, 3, 2, 0, 1, 5, 3, 2, 3, 1, 3, 4, 1, 9, 1, 5, 2, 3, 0, 3
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,4
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LINKS
| Harry J. Smith, Table of n, a(n) for n=1,...,1000
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EXAMPLE
| Between 113 and 127 the 7 numbers which are not squarefree are as follows: are:{116,117,120,121,124,125,126}, so a(30)=7
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PROG
| (PARI) { n=0; q=2; forprime (p=3, prime(1001), a=0; for (i=q+1, p-1, a+=!issquarefree(i)); write("b061399.txt", n++, " ", a); q=p ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Jul 22 2009]
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CROSSREFS
| A005117, A013929.
Sequence in context: A062277 A204929 A118210 * A161856 A122944 A107688
Adjacent sequences: A061396 A061397 A061398 * A061400 A061401 A061402
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KEYWORD
| nonn
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AUTHOR
| Labos E. (labos(AT)ana.sote.hu), Jun 07 2001
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