0,1

Sum of reciprocals = 0.5434783035011462065880780409..

(PARI) concatprime(n, p) = { sr=0; y=""; for(x=p, n, y=concat(Str(y), Str(x)); z=eval(y); if(ispseudoprime(z), print1(z", "); sr+=1./z; ); ); print(); print(sr) }

Sequence in context: A114256 A110714 A067837 this_sequence A162605 A118812 A054909

Adjacent sequences: A089984 A089985 A089986 this_sequence A089988 A089989 A089990

nonn,base

Cino Hilliard (hillcino368(AT)gmail.com), Jan 14 2004