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 A083203 #9 Jan 08 2019 09:12:41 %S A083203 1,7,9,38,35,117,91,8,614,39312,167143,9225632,27823518,3438671571811, %T A083203 810534219404852834,350099109163999874259659131507909, %U A083203 538073411436415103320989698699207584507533583587852139 %N A083203 a(1) = 1, then smallest number not included earlier such that a(n)*a(n+1) + 1 is a cube. %C A083203 The next 3 terms are (to 2 significant digits) 4.1*10^95, 1.3*10^183, 3.6*10^351. %e A083203 7*9 + 1 = 64 = 8^3, 9*38 + 1 = 343= 7^3. %Y A083203 Cf. A083204, A082536. %Y A083203 Cf. A091569. %K A083203 nonn %O A083203 1,2 %A A083203 _Amarnath Murthy_, Apr 28 2003 %E A083203 Corrected and extended by _Vladeta Jovovic_, May 01 2003 %E A083203 More terms from _Michel ten Voorde_ Jun 23 2003 %E A083203 More terms from _Vladeta Jovovic_, Jun 29 2003 %E A083203 a(15) - a(17) from _David Wasserman_, Mar 18 2004 %E A083203 More terms from _David Wasserman_, May 20 2004