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A139520 Denominators of an Egyptian fraction for Catalan constant, using only prime numbers and allowing repetitions. 2
2, 3, 13, 179, 8161, 17319373, 24288185721827, 115965508643355137277722177, 235520782452648150490328050427067627593114827790363, 34927738441197833781363566983541975805101681093066970452740268721673910282017002081858804680098723909 (list; graph; refs; listen; history; internal format)
OFFSET

0,1

COMMENTS

Good approximation up to 789 decimal digits

MAPLE

P:=proc(n) local a, i; a:=evalf(Catalan, 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-A139519, A139521-A139523.

Sequence in context: A113785 A118323 A113494 * A132535 A056806 A119564

Adjacent sequences:  A139517 A139518 A139519 * A139521 A139522 A139523

KEYWORD

easy,nonn,frac

AUTHOR

Paolo P. Lava & Giorgio Balzarotti (paoloplava(AT)gmail.com), Apr 28 2008

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Last modified February 15 16:56 EST 2012. Contains 205825 sequences.