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A048430 Smallest denominator of fraction using palindromes that approximates 'Pi' to at least n digits after the decimal point. 1
7, 7, 212, 212, 377773, 519915, 2332332, 65144156, 309171903, 10319091301, 58981418985, 1833641463381, 1992590952991, 47417877871474, 704928828829407, 15508087878080551, 89528359195382598, 1823627796977263281 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..18.

EXAMPLE

n=5 -> 1186811/377773 = 3.14159... correct to five digits after the decimal point.

CROSSREFS

Numerators in A048429.

Sequence in context: A001988 A099739 A261128 * A197860 A180321 A213150

Adjacent sequences:  A048427 A048428 A048429 * A048431 A048432 A048433

KEYWORD

nonn,frac,base,more

AUTHOR

Patrick De Geest, Apr 15 1999

EXTENSIONS

a(15)-a(18) from Sean A. Irvine, Jun 17 2021

STATUS

approved

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Last modified January 25 15:34 EST 2022. Contains 350572 sequences. (Running on oeis4.)