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 A121905 #23 Sep 08 2022 08:45:27 %S A121905 1,24,536,12392,286752,6635624,153552936,3553321281,82226315586, %T A121905 1902773895293,44031505860633,1018919543279305,23578503968558227, %U A121905 545622913077172101,12626092124920479898,292176517015939695008 %N A121905 a(n) = ceiling(e^(n*Pi)). %H A121905 Vincenzo Librandi, <a href="/A121905/b121905.txt">Table of n, a(n) for n = 0..699</a> [Offset shifted by _Georg Fischer_, Sep 02 2022] %t A121905 Ceiling[E^(Pi Range[0, 20])] (* _Vincenzo Librandi_, Feb 21 2013 *) %o A121905 (PARI) for(n=0,50, print1(ceil(exp(Pi*n)), ", ")) \\ _G. C. Greubel_, Nov 06 2017 %o A121905 (Magma) C<i> := ComplexField(); [Ceiling(Exp(Pi(C)*n)): n in [0..50]]; // _G. C. Greubel_, Nov 06 2017 %Y A121905 Cf. A062360 (floor). %Y A121905 Cf. A121854, A121855, A121856, A121857, A121904. %K A121905 nonn,easy %O A121905 0,2 %A A121905 _Mohammad K. Azarian_, Sep 01 2006 %E A121905 Offset changed to 0 by _Georg Fischer_, Sep 02 2022