1,3

Any further terms have more than 10,000 digits. - Charles R Greathouse IV, Sep 16 2015

Table of n, a(n) for n=1..9.

(PARI) list(lim)=my(F=List(), v=List([0, 1]), n=1, t); while((t=fibonacci(n++))<=lim, listput(F, t)); F=Vec(F); for(i=1, #F, for(j=i, #F, if(issquare(t=F[i]+F[j]), listput(v, t)))); Set(v) \\ Charles R Greathouse IV, Sep 16 2015

Squares in A084176 (or A059389). Cf. A000045.

Sequence in context: A233247 A231180 A250029 * A106313 A219355 A291216

Adjacent sequences: A111375 A111376 A111377 * A111379 A111380 A111381

nonn

Giovanni Teofilatto, Nov 09 2005

1600 from Jonathan Vos Post, Nov 11 2005

14930496 from N. J. A. Sloane, Nov 11 2005

approved