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A138336
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First occurence of exactly n consecutive numbers after A138335(n) (A138335(n) excluded).
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9
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OFFSET
| 1,1
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COMMENTS
| Such number digits after decimal point of number Pi where the approximation to the number Pi by a root of a polynomial of 2 degree does not improve the accuracy exactly n next digits
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EXAMPLE
| a(1)=18 because 3.141592653589793238 (18 digits) is root of -3061495+674903*x+95366*x^2 and 3.1415926535897932385 (19 digits) also is root of that same polynomial -3061495+674903*x+95366*x^2
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CROSSREFS
| Cf. A138335, A138337, A138338.
Sequence in context: A109911 A065751 A038632 * A166630 A154920 A094224
Adjacent sequences: A138333 A138334 A138335 * A138337 A138338 A138339
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KEYWORD
| nonn,uned
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AUTHOR
| Artur Jasinski (grafix(AT)csl.pl), Mar 15 2008
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EXTENSIONS
| There are comments in the entry for A138335 which may cast doubt on the validity of this and related sequences. - N. J. A. Sloane (njas(AT)research.att.com), Mar 19 2008
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