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 A378408 #15 Dec 01 2024 03:41:03
%S A378408 3,4,0,0,2,1,8,7,1,9,8,3,6,4,6,0,5,9,1,8,0,8,2,3,6,7,7,8,2,6,0,3,9,5,
%T A378408 6,2,7,5,5,8,8,9,6,7,4,0,3,1,1,9,4,4,3,3,9,4,8,3,2,4,9,3,7,4,2,9,1,4,
%U A378408 9,9,9,1,2,5,9,5,7,1,1,3,8,3,1,7,5,3,7,2,2,2
%N A378408 Decimal expansion of Pi^5/90.
%C A378408 See Penn link for a geometric interpretation.
%H A378408 Amiram Eldar, <a href="/A378408/a378408.jpg">Illustration</a>.
%H A378408 Michael Penn, <a href="https://www.youtube.com/watch?v=ZBTPG6dp_0U">A twist on a classic circle problem</a>, YouTube video, 2024.
%H A378408 <a href="/wiki/Index_to_constants#Start_of_section_Z">Index entries for constants related to zeta</a>.
%H A378408 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a>.
%F A378408 Equals Pi*Sum_{k >= 1} 1/k^4 = Pi*zeta(4) = A000796*A013662.
%F A378408 Equals A092731/90.
%e A378408 3.4002187198364605918082367782603956275588967403119...
%t A378408 First[RealDigits[Pi^5/90, 10, 100]]
%o A378408 (PARI) Pi^5/90 \\ _Charles R Greathouse IV_, Nov 27 2024
%Y A378408 Cf. A000796, A013662, A092731, A279037.
%K A378408 nonn,cons,easy
%O A378408 1,1
%A A378408 _Paolo Xausa_, Nov 25 2024