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Search: id:A139522
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| A139522 |
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Denominators of an Egyptian fraction for ln(2), using only prime numbers and allowing repetitions. |
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+0
3
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| 2, 7, 23, 149, 9967, 27514363, 217357018990141, 1606507138380520696666019221, 25278175600230973831063754126661264411663401021548343, 26582477899930207632055881740605033754224049329078838341019668120600330516485615\ 45028435381434723862291
(list; graph; listen)
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OFFSET
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0,1
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COMMENT
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Good approximation up to 800 decimal digits
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MAPLE
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P:=proc(n) local a, i; a:=evalf(ln(2), 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);
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CROSSREFS
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Cf. A139514-A139521, A139523.
Sequence in context: A049021 A002494 A032264 this_sequence A163158 A112089 A075062
Adjacent sequences: A139519 A139520 A139521 this_sequence A139523 A139524 A139525
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KEYWORD
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easy,nonn,frac
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AUTHOR
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Paolo P. Lava & Giorgio Balzarotti (ppl(AT)spl.at), Apr 28 2008
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