This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A177357 #11 Feb 12 2019 00:46:18 %S A177357 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, %T A177357 11,11,12,12,12,12,12,13,13,13,13,13,13,14,14,14,14,15,15,15,15,15,15, %U A177357 16,16,16,16,16,16,17,17,17,17,17,18,18,18,18,18,18,19,19,19,19,19,19,19 %N A177357 Number of positive squares <= prime(n) - 3. %F A177357 a(n) = A000196(A086801(n)). - _R. J. Mathar_, May 09 2010 %p A177357 A000196 := proc(n) floor(sqrt(n)) ; end proc: %p A177357 A086801 := proc(n) ithprime(n)-3 ; end proc: %p A177357 A177357 := proc(n) A000196(A086801(n)) ; end proc: seq(A177357(n),n=2..90) ; # _R. J. Mathar_, May 09 2010 %t A177357 Floor[Sqrt[Prime[Range[2,80]]-3]] (* _Harvey P. Dale_, Dec 15 2018 *) %Y A177357 Cf. A000006. %K A177357 nonn %O A177357 2,3 %A A177357 _Giovanni Teofilatto_, May 07 2010 %E A177357 Edited by _N. J. A. Sloane_, May 08 2010 %E A177357 More terms from _R. J. Mathar_, May 09 2010 %E A177357 Reference redirected to a valid A-number by _R. J. Mathar_, May 09 2010