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 A094289 #34 Feb 18 2024 08:26:14
%S A094289 2,8,7,3,5,8,2,5,1,3,0,6,2,2,4,1,7,9,7,3,6,4,1,8,0,4,5,8,7,8,9,3,2,2,
%T A094289 0,6,9,5,5,9,0,8,8,0,2,6,8,5,8,8,1,7,0,9,2,9,9,4,9,9,3,6,8,9,4,7,0,8,
%U A094289 9,3,2,9,2,7,8,6,8,8,9,3,9,7,7,0,2,0,9,1,2,4,2,8,0,0,2,9,0,9,0,0,5,5,9,2,9
%N A094289 Decimal expansion of Sum(1/p^p) where p is prime.
%C A094289 This constant approximately equals 5226294/18187381. - _Yalcin Aktar_, Nov 05 2006
%C A094289 The asymptotic mean of A129251. - _Amiram Eldar_, Nov 07 2022
%e A094289 0.287358251306224179736418045878932206955908802685881709299499368947089...
%t A094289 digits = 105; n0 = 10; dn = 10; Clear[f]; f[n_] := f[n] = RealDigits[ Sum[ 1/Prime[k]^Prime[k], {k, 1, n}], 10, digits+5] // First; f[n = n0]; f[n = n+dn]; While[Print["n = ", n]; f[n] != f[n-dn], n = n+dn]; Take[f[n], digits] (* _Jean-François Alcover_, Nov 22 2013 *)
%o A094289 (PARI) ptothep(n) = { local(x,s,a); default(realprecision,200); s=0; forprime(x=2,n,s+=1./x^x); a=Vec(Str(s)); for(x=3,n,print1(eval(a[x]),",")) }
%Y A094289 Cf. A073009, A083648, A051674 (prime(n)^prime(n)), A129251.
%K A094289 nonn,cons
%O A094289 0,1
%A A094289 _Cino Hilliard_, Jul 31 2004
%E A094289 Offset corrected by _R. J. Mathar_, Feb 05 2009