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 A017955 #25 Dec 27 2024 13:29:31 %S A017955 1,4,17,70,289,1191,4913,20256,83521,344365,1419857,5854220,24137569, %T A017955 99521746,410338673,1691869691,6975757441,28761784747,118587876497, %U A017955 488950340714,2015993900449,8312155792152,34271896307633,141306648466586,582622237229761,2402213023931974 %N A017955 Powers of sqrt(17) rounded down. %H A017955 Vincenzo Librandi, <a href="/A017955/b017955.txt">Table of n, a(n) for n = 0..800</a> %F A017955 a(n) = floor(sqrt(17^n)) = A000196(A001026(n)). - _Vincenzo Librandi_, Jun 24 2011 %o A017955 (Magma) [Floor(Sqrt(17^n)): n in [0..30]]; // _Vincenzo Librandi_, Jun 24 2011 %o A017955 (PARI) a(n)=sqrtint(17^n) \\ _Charles R Greathouse IV_, Nov 18 2011 %Y A017955 Cf. A000196, A001026 (even bisection), A010473 (sqrt(17)). %K A017955 nonn %O A017955 0,2 %A A017955 _N. J. A. Sloane_