A046850 Gilda's primes: primes in A042947.

29, 683, 997, 2207, 30571351, 271953103

Offset

1,1

Comments

Is this sequence infinite?

Links

Table of n, a(n) for n=1..6.

Russo, F. A Set of New Smarandache Functions, Sequences and Conjectures in Number Theory., Lupton, AZ: American Research Press, 2000.

Prog

(PARI) for(n=1, 10^8, if(isprime(n), s=eval(Vec(Str(n))); f1=sum(i=1, #s, s[i]); f0=abs(2*s[1]-f1); f=f0+f1; while(f<=n, if(f==n, print1(n, ", "); break); f0=f1; f1=f; f=f0+f1))) \\ Herman Jamke (hermanjamke(AT)fastmail.fm), Mar 30 2008

Crossrefs

Cf. A042947.

Sequence in context: A063044 A062560 A135995 * A342895 A180844 A159669

Adjacent sequences: A046847 A046848 A046849 * A046851 A046852 A046853

Keyword

nonn,base,less

Author

Felice Russo

Extensions

a(5) from Herman Jamke (hermanjamke(AT)fastmail.fm), Mar 30 2008

a(6) from Sean A. Irvine, Apr 28 2021

Status

approved