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 A193548 #23 Jul 21 2019 13:26:32
%S A193548 2,2,7,6,1,0,8,1,5,1,6,2,5,7,3,4,0,9,4,7,9,1,0,6,1,4,1,2,0,3,1,4,9,7,
%T A193548 4,4,6,6,9,7,9,7,4,2,6,0,3,0,0,2,3,7,7,5,6,1,5,5,1,6,1,7,0,9,8,2,7,5,
%U A193548 0,6,3,7,2,8,6,3,0,1,4,3,1,8,6,6,8,4,6,5,7
%N A193548 Decimal expansion of exp(Pi^2/12).
%F A193548 exp(Pi^2/12) = Product_{n>=1} Product_{k=1..n+1} k^(1/(n+1)) * H(n) * (-1)^k * binomial(n, k-1) where H(n) is the n-th harmonic number.
%F A193548 exp(Pi^2/12) = lim_{n -> infinity} Product_{k=1..n} (1 + k/n)^(1/k). - _Peter Bala_, Feb 14 2015
%t A193548 Product[Product[k^((1/(n+1))*(-1)^(k)*Binomial[n,k-1]*HarmonicNumber[n]),{k,1,n+1}],{n,1,Infinity}]
%t A193548 RealDigits[E^(Pi^2/12), 10, 100]
%o A193548 (PARI) exp(Pi^2/12) \\ _Charles R Greathouse IV_, Jul 30 2011
%Y A193548 Cf. A001113, A022493, A122214, A122215, A122216, A122217, A138265, A207651, A242153, A242154, A242155, A242156, A242157, A242158, A242159, A242160, A242161, A242162, A242163, A242164.
%K A193548 cons,nonn,easy
%O A193548 1,1
%A A193548 _John M. Campbell_, Jul 30 2011