A139518 Denominators of an Egyptian Fraction for phi = (1+sqrt(5))/2, using only prime numbers and allowing repetitions.

2, 2, 2, 11, 37, 10223, 19168273, 393878854986413, 26597184780678178240425310001, 15149418213990289905061345119914042470386161523151934159

Offset

0,1

Comments

Good approximation up to 800 decimal digits

Links

Table of n, a(n) for n=0..9.

Maple

P:=proc(n) local a, i; a:=evalf((1+sqrt(5))/2-1, 100); for i from 1 by 1 to n do if 1/ithprime(i)<a then a:=a-1/ithprime(i); print(a); print(ithprime(i)); fi; od; end: P(100000);

Crossrefs

Cf. A139514-A139517, A139519-A139523.

Sequence in context: A019233 A121223 A327559 * A335986 A152662 A135322

Adjacent sequences: A139515 A139516 A139517 * A139519 A139520 A139521

Keyword

easy,nonn,frac

Author

Paolo P. Lava and Giorgio Balzarotti, Apr 28 2008

Status

approved