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 A177357 Number of positive squares <= prime(n) - 3. 1
 0, 1, 2, 2, 3, 3, 4, 4, 5, 5, 5, 6, 6, 6, 7, 7, 7, 8, 8, 8, 8, 8, 9, 9, 9, 10, 10, 10, 10, 11, 11, 11, 11, 12, 12, 12, 12, 12, 13, 13, 13, 13, 13, 13, 14, 14, 14, 14, 15, 15, 15, 15, 15, 15, 16, 16, 16, 16, 16, 16, 17, 17, 17, 17, 17, 18, 18, 18, 18, 18, 18, 19, 19, 19, 19, 19, 19, 19 (list; graph; refs; listen; history; text; internal format)
 OFFSET 2,3 LINKS FORMULA a(n) = A000196(A086801(n)). - R. J. Mathar, May 09 2010 MAPLE A000196 := proc(n) floor(sqrt(n)) ; end proc: A086801 := proc(n) ithprime(n)-3 ; end proc: A177357 := proc(n) A000196(A086801(n)) ; end proc: seq(A177357(n), n=2..90) ; # R. J. Mathar, May 09 2010 MATHEMATICA Floor[Sqrt[Prime[Range[2, 80]]-3]] (* Harvey P. Dale, Dec 15 2018 *) CROSSREFS Cf. A000006. Sequence in context: A186704 A067434 A336348 * A320297 A165906 A165907 Adjacent sequences:  A177354 A177355 A177356 * A177358 A177359 A177360 KEYWORD nonn AUTHOR Giovanni Teofilatto, May 07 2010 EXTENSIONS Edited by N. J. A. Sloane, May 08 2010 More terms from R. J. Mathar, May 09 2010 Reference redirected to a valid A-number by R. J. Mathar, May 09 2010 STATUS approved

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Last modified May 15 13:52 EDT 2021. Contains 343920 sequences. (Running on oeis4.)