A048430 Smallest denominator of fraction using palindromes that approximates 'Pi' to at least n digits after the decimal point.

7, 7, 212, 212, 377773, 519915, 2332332, 65144156, 309171903, 10319091301, 58981418985, 1833641463381, 1992590952991, 47417877871474, 704928828829407, 15508087878080551, 89528359195382598, 1823627796977263281

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: A099739 A261128 A353583 * 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