%I #18 Feb 12 2021 12:16:16
%S 1,9,7,3,0,8,1,9,0,6,0,5,0,1,9,2,2,2,0,2,7,2,9,7,6,1,8,1,7,2,1,2,4,5,
%T 3,5,7,4,8,0,6,6,4,1,5,1,0,6,5,2,2,2,0,1,7,3,6,2,6,1,8,9,6,7,4,6,0,9,
%U 9,1,5,3,1,7,9,1,3,2,3,4,1,2,9,4,9,1,6,4,7,8,0,0,8,4,5,4,9,9,6,4,5,0,4,2,9,9,9,5,6,6,3,4,4,6,1,6,9,5,5,0
%N Decimal expansion of (3*exp(1/2) - 1)/2.
%H O. A. Akinfenwa, et al., <a href="https://doi.org/10.12732/ijpam.v93i2.5">Block Method for Numerical Solution of Differential-Algebraic Equations with Hessenberg Index-3</a>, International Journal of Pure and Applied Mathematics, 2 (2014).
%e 1.973081906050192220272976...
%t RealDigits[3*Exp(1/2)/2 - 1/2, 10, 120][[1]]
%o (PARI) 3*exp(1/2)/2 - 1/2 \\ _Michel Marcus_, Mar 31 2019
%Y Cf. A003417 (Engel expansion).
%K cons,nonn
%O 1,2
%A _Terry D. Grant_, Mar 29 2019