A111378 - OEIS

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A111378

Squares that are equal to the sum of two Fibonacci numbers.

0, 1, 4, 9, 16, 36, 144, 1600, 14930496 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,3`
	COMMENTS	`Any further terms have more than 10,000 digits. - Charles R Greathouse IV, Sep 16 2015`
	LINKS	`Table of n, a(n) for n=1..9.`
	PROG	`(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`
	CROSSREFS	`Squares in A084176 (or A059389). Cf. A000045.` `Sequence in context: A233247 A231180 A250029 * A106313 A219355 A291216` `Adjacent sequences: A111375 A111376 A111377 * A111379 A111380 A111381`
	KEYWORD	`nonn`
	AUTHOR	`Giovanni Teofilatto, Nov 09 2005`
	EXTENSIONS	`1600 from Jonathan Vos Post, Nov 11 2005` `14930496 from N. J. A. Sloane, Nov 11 2005`
	STATUS	`approved`

Last modified March 2 12:26 EST 2021. Contains 341750 sequences. (Running on oeis4.)