A092388 a(n) is the smallest positive integer such that the product of all 1/(1-1/a(n)) is less than Pi.

2, 3, 23, 601, 1800857, 15150670259532, 428274542923473692585258931, 684206983591194904989689062059991542510707643860720258, 792823608217999404644552059785470357855585023133283985498107007444338827113094578293029854179197929809783961

Offset

1,1

Comments

Based on an idea of Leroy Quet, who provided the first three terms.

Links

Table of n, a(n) for n=1..9.

Example

a(3)=23 because (1/(1-1/2))*(1/(1-1/3))*(1/(1-1/23)) < Pi and (1/(1-1/2))*(1/(1-1/3))*(1/(1-1/22)) > Pi.

Crossrefs

Sequence in context: A289550 A154553 A160341 * A225726 A076530 A360225

Adjacent sequences: A092385 A092386 A092387 * A092389 A092390 A092391

Keyword

nonn

Author

Hans Havermann, Mar 20 2004

Status

approved