A397435 - OEIS

%I #29 Jul 06 2026 00:36:19

%S 3,6,9,4,5,2,8,0,4,9,4,6,5,3,2,5,1,1,3,6,1,5,2,1,3,7,3,0,2,8,7,5,0,3,

%T 9,0,6,5,9,0,1,5,7,7,8,5,2,7,5,9,2,3,6,6,2,0,4,3,5,6,3,9,1,1,2,6,1,2,

%U 8,6,8,9,8,0,3,9,5,2,8,8,8,1,6,9,2,1,5,6,2,4,2,5,3,9,5,6,0,8,9,7

%N Decimal expansion of exp(2)/2.

%H Paolo Xausa, <a href="/A397435/b397435.txt">Table of n, a(n) for n = 1..10000</a>

%H Jerrad Hampton and Alireza Doostan, <a href="https://arxiv.org/pdf/1408.4157">Compressive Sampling of Polynomial Chaos Expansions: Convergence Analysis and Sampling Strategies</a>, arxiv:1408.4157 [math.PR], 2014.

%H <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a>.

%F Equals A062546 + 3.5.

%F Equals A072334/2.

%F Equals 1/A325905.

%e 3.6945280494653251136152137302875039...

%t First[RealDigits[Exp[2]/2, 10, 100]] (* _Paolo Xausa_, Jun 25 2026 *)

%o (SageMath)

%o seq = RealField(500)(exp(2)/2).str(base=10)

%o list = [int(i) for i in seq if i.isdigit()][:70]

%o print(list)

%o (PARI) exp(2)/2 \\ _Charles R Greathouse IV_, Jul 06 2026

%Y Cf. A001113, A072334, A092553, A325905.

%Y Essentially the same as A062546.

%K nonn,cons,changed

%O 1,1

%A _Aitzaz Imtiaz_, Jun 24 2026