OFFSET
0,1
LINKS
Steven R. Finch and Pascal Sebah, Squares and Cubes Modulo n, arXiv:math/0604465 [math.NT], 2006-2016.
FORMULA
Equals exp(Sum_{n>=2} -( (-1)^n + 2^(n-1))*P(n)/(n*2^n), where P(n) is the prime zeta P function.
EXAMPLE
0.81210571116312251170625096458188717656057710048366992436092182...
MATHEMATICA
digits = 100; Exp[NSum[-( (-1)^n + 2^(n - 1))*PrimeZetaP[n]/(n* 2^n), {n, 2, Infinity}, NSumTerms -> 3 digits, WorkingPrecision -> digits + 10]] // RealDigits[#, 10, digits]& // First
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Jean-François Alcover, Apr 10 2016
STATUS
approved