OFFSET
0,1
COMMENTS
This constant approximately equals 5226294/18187381. - Yalcin Aktar, Nov 05 2006
The asymptotic mean of A129251. - Amiram Eldar, Nov 07 2022
EXAMPLE
0.287358251306224179736418045878932206955908802685881709299499368947089...
MATHEMATICA
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 *)
PROG
(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]), ", ")) }
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Cino Hilliard, Jul 31 2004
EXTENSIONS
Offset corrected by R. J. Mathar, Feb 05 2009
STATUS
approved