A306966 Decimal expansion of t+t^2, where t is the tribonacci constant, the real root of x^3 - x^2 - x - 1.
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, 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, 7, 5, 1, 1, 8, 0, 9, 1, 9, 0, 6, 7, 1, 7, 9, 6, 2
Offset: 1
Examples
5.222262523120398626674561101108321187373560789846...
Programs
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Mathematica
RealDigits[Root[x^3-x^2-x-1, 1]^3-1, 10, 100][[1]] (* Amiram Eldar, Mar 23 2019 *)
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PARI
solve(x=0, 10, x^3 - x^2 - x - 1)^3 - 1 \\ Michel Marcus, Mar 23 2019
Comments