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 A306966 #9 Mar 23 2019 17:42:59 %S A306966 5,2,2,2,2,6,2,5,2,3,1,2,0,3,9,8,6,2,6,6,7,4,5,6,1,1,0,1,1,0,8,3,2,1, %T A306966 1,8,7,3,7,3,5,6,0,7,8,9,8,4,6,1,6,8,4,2,8,7,9,8,3,2,1,3,1,6,6,3,9,5, %U A306966 7,5,1,1,8,0,9,1,9,0,6,7,1,7,9,6,2 %N A306966 Decimal expansion of t+t^2, where t is the tribonacci constant, the real root of x^3 - x^2 - x - 1. %C A306966 By definition, this is also t^3-1 (cf. A276801). %e A306966 5.222262523120398626674561101108321187373560789846... %t A306966 RealDigits[Root[x^3-x^2-x-1, 1]^3-1, 10, 100][[1]] (* _Amiram Eldar_, Mar 23 2019 *) %o A306966 (PARI) solve(x=0, 10, x^3 - x^2 - x - 1)^3 - 1 \\ _Michel Marcus_, Mar 23 2019 %Y A306966 Cf. A058265, A276801. %K A306966 nonn,cons %O A306966 1,1 %A A306966 _N. J. A. Sloane_, Mar 23 2019