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 A116472 #20 Sep 08 2022 08:45:24 %S A116472 1,7,54,403,2980,22026,162754,1202604,8886110,65659969,485165195, %T A116472 3584912846,26489122129,195729609428,1446257064291,10686474581524, %U A116472 78962960182680,583461742527454,4311231547115195,31855931757113756,235385266837019985,1739274941520501047 %N A116472 a(n) = floor(exp(2*n)). %C A116472 A bisection of A000149, which is the main entry for this sequence. %C A116472 a(n) = A000149(2*n). %H A116472 Georg Fischer, <a href="/A116472/b116472.txt">Table of n, a(n) for n = 0..100</a> (first 36 terms from Vincenzo Librandi) %t A116472 Floor[Exp[2Range[0,30]]] (* _Harvey P. Dale_, Aug 22 2011 *) %o A116472 (Magma) [Floor(Exp(2*n)): n in [0..25]]; // _Vincenzo Librandi_, Aug 23 2011 %o A116472 (PARI) a(n)=exp(2*n)\1 \\ _Charles R Greathouse IV_, Aug 23 2011 %o A116472 (Haskell) %o A116472 a116472 = a000149 . (* 2) -- _Reinhard Zumkeller_, Mar 17 2015 %Y A116472 Cf. A000149. %K A116472 nonn %O A116472 0,2 %A A116472 Milton L. Brown (miltbrown(AT)earthlink.net), Jan 20 2008 %E A116472 More terms from _Harvey P. Dale_, Aug 22 2011