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 A290340 Numbers n such that each of the four consecutive integers n, n+1, n+2, n+3 have squarefree rank 1. 2
 17, 241, 242, 1249, 4049, 4799, 17297, 120049, 206081, 281249, 388961, 470447, 538721, 1462049, 1566449, 1808801, 1916881, 3302449, 3302450, 3693761, 3959297, 5385761, 5664976, 6118001, 6986321, 9305297, 10479041, 14268481 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS A162642(k) is the squarefree rank of k. LINKS Jason Kimberley, Table of n, a(n) for n = 1..79 PROG (MAGMA) A162642:=func; c:=func; c(c(c([n:n in[1..10^6]|A162642(n)eq 1]))); CROSSREFS Cf. A162642, A229125, A277225. Sequence in context: A264455 A142126 A251769 * A103772 A196987 A051560 Adjacent sequences:  A290337 A290338 A290339 * A290341 A290342 A290343 KEYWORD nonn AUTHOR Jason Kimberley, Jul 27 2017 STATUS approved

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Last modified January 21 08:09 EST 2020. Contains 331104 sequences. (Running on oeis4.)