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A069257 Denominator of the last term of the Egyptian fraction sum (using the greedy algorithm) which satisfies 1 = 1/n + 1/(n+1) + 1/(n+2) ... 1/a(n). 0
6, 20, 57960, 3145940416080, 5765760, 288680192354725622464710969631440008928, 20484953806009937929429725901717124022833778640, 59553628273094395440, 102119994931499628863688098762720537989600 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,1

COMMENTS

The next term in the series, a(11), is 7*10^192.

LINKS

Table of n, a(n) for n=2..10.

EXAMPLE

Since 1 = 1/3 + 1/4 + 1/5 + 1/6 + 1/20, a(3) = 20.

CROSSREFS

Sequence in context: A216912 A175671 A222741 * A133885 A170867 A064929

Adjacent sequences:  A069254 A069255 A069256 * A069258 A069259 A069260

KEYWORD

easy,frac,nonn

AUTHOR

Christopher Lund (clund(AT)san.rr.com), Apr 14 2002

STATUS

approved

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Last modified October 2 12:28 EDT 2014. Contains 247541 sequences.