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 A078983 #21 Aug 05 2024 12:45:36 %S A078983 1,2,3,17,54,179,412,591,12823,13414,26237,39651,184841,409333,594174, %T A078983 28929685,2054601809,14411142348,16465744157,30876886505,294357722702, %U A078983 325234609207,944826941116,1270061550323,14915503994669,16185565544992 %N A078983 Numerators of continued fraction convergents to cosh(1). %H A078983 Vincenzo Librandi, <a href="/A078983/b078983.txt">Table of n, a(n) for n = 0..199</a> %t A078983 Numerator[Convergents[Cosh[1],30]] (* _Harvey P. Dale_, Feb 02 2012 *) %o A078983 (PARI) a(n)=component(component(contfracpnqn(contfrac(cosh(1),n+1)),1),1) %Y A078983 Cf. A068118 (continued fraction), A073743 (decimal expansion), A078982 (denominators). %K A078983 frac,nonn %O A078983 0,2 %A A078983 _Benoit Cloitre_, Dec 20 2002 %E A078983 Offset changed by _Andrew Howroyd_, Aug 05 2024