A094724 Decimal expansion of Sum(1/c^c) where c is nonprime.

1, 0, 0, 3, 9, 2, 7, 7, 4, 5, 7, 5, 6, 4, 3, 9, 3, 6, 0, 6, 7, 0, 8, 6, 4, 5, 4, 4, 7, 1, 6, 6, 6, 8, 3, 3, 4, 5, 4, 2, 7, 1, 0, 5, 6, 5, 5, 8, 8, 6, 4, 0, 6, 0, 8, 0, 1, 0, 5, 0, 3, 0, 7, 6, 1, 8, 9, 8, 5, 5, 2, 0, 9, 4, 8, 6, 5, 4, 5, 5, 1, 5, 7, 8, 8, 6, 0, 7, 9, 1, 6, 8, 4, 9, 4, 0, 0, 6, 1, 8, 9, 2, 9, 0, 6

Offset

1,4

Links

Table of n, a(n) for n=1..105.

Example

1/1^1+1/4^4 +1/6^6 +1/8^8+ ... = 1.003927745756...

Mathematica

RealDigits[Total[1/#^# &/@Select[Range[100], !PrimeQ[#]&]], 10, 120][[1]] (* Harvey P. Dale, Nov 09 2014 *)

Prog

(PARI) ctothec(n) = { local(x, s, a); default(realprecision, 300); s=0; print1(1", "); for(x=1, n, if(!isprime(x), s+=1./x^x)); a=Vec(Str(s)); for(x=3, n, print1(eval(a[x]), ", ")); print(); print(s) }

Crossrefs

Sequence in context: A175993 A021722 A293383 * A008564 A348371 A354129

Adjacent sequences: A094721 A094722 A094723 * A094725 A094726 A094727

Keyword

nonn,cons

Author

Cino Hilliard, Jul 31 2004

Status

approved