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 A084233 #18 Feb 16 2025 08:32:49
%S A084233 1,3,8,3,2,8,5,3,0,4,2,2,7,2,2,5,1,8,8,5,6,6,8,3,0,2,5,4,8,2,9,4,6,9,
%T A084233 8,3,9,3,2,7,0,0,6,8,2,8,4,8,5,1,9,9,2,2,3,9,9,8,0,4,9,3,3,3,6,7,4,4,
%U A084233 5,0,3,0,3,9,8,6,4,2,0,0,6,0,3,1,4,8,9,5,6,0,2,6,2,5,9,0,5,7,4,6
%N A084233 Decimal expansion of area under the curve Zeta(1/2 + t*I) from zero to its first nontrivial zero (A058303).
%H A084233 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/RiemannZetaFunctionZeros.html">Riemann Zeta Function Zeros</a>
%H A084233 <a href="/index/Z#zeta_function">Index entries for zeta function</a>.
%e A084233 13.832853042...
%t A084233 digits = 100; NIntegrate[ Zeta[1/2 + t*I] // Abs, {t, 0, ZetaZero[1] // Im}, WorkingPrecision -> digits+5] // RealDigits[#, 10, digits]& // First (* _Jean-François Alcover_, Mar 05 2013 *)
%o A084233 (PARI) intnum(t=0,solve(s=14,15,imag(zeta(1/2+I*s))),abs(zeta(1/2+I*t))) /* Brad Chalfan (brad(AT)chalfan.net), Aug 31 2010 */
%Y A084233 Cf. A058303.
%K A084233 nonn,cons
%O A084233 2,2
%A A084233 _Robert G. Wilson v_, May 11 2003
%E A084233 More terms from Brad Chalfan (brad(AT)chalfan.net), Aug 31 2010