A068361 Numbers n such that the number of squarefree numbers between prime(n) and prime(n+1) = prime(n+1)-prime(n)-1.

1, 3, 10, 13, 26, 33, 60, 89, 104, 113, 116, 142, 148, 201, 209, 212, 234, 265, 268, 288, 313, 320, 332, 343, 353, 384, 398, 408, 477, 484, 498, 542, 545, 551, 577, 581, 601, 625, 636, 671, 719, 723, 726, 745, 794, 805, 815, 862, 864, 884, 944, 964, 995, 1054

Offset

1,2

Links

Amiram Eldar, Table of n, a(n) for n = 1..10000

Formula

n such that A061398(n) = prime(n+1)-prime(n)-1.

Prog

(PARI) isok(n) = for (k=prime(n)+1, prime(n+1)-1, if (!issquarefree(k), return (0))); 1; \\ Michel Marcus, Apr 29 2016

Crossrefs

Cf. A061398.

Sequence in context: A042479 A042897 A041169 * A285181 A042331 A082975

Adjacent sequences: A068358 A068359 A068360 * A068362 A068363 A068364

Keyword

nonn

Author

Benoit Cloitre, Feb 28 2002

Status

approved