1,1

By "consecutive squarefree numbers" we mean consecutive terms of A005117, not consecutive integers that also happen to be squarefree.

Table of n, a(n) for n=1..5.

462807341, 462807343, 462807347, 462807349, and 462807353 are the smallest 5 primes that are also consecutive squarefree numbers, so a(1) = 462807341.

115, 118, 119, 122, and 123 are the smallest 5 semiprimes that are also consecutive squarefree numbers, so a(2) = 115.

6302, 6303, 6305, 6306, and 6307 is the smallest 5-tuple of consecutive squarefree numbers each of which has exactly 3 prime factors, so a(3) = 6302.

Cf. A005117, A242621 (triplet version), A246470 (quadruplet version), A246471.

Sequence in context: A096556 A038830 A038819 * A260524 A091677 A147717

Adjacent sequences: A246545 A246546 A246547 * A246549 A246550 A246551

nonn

Hans Havermann, Aug 29 2014

approved