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 A239297 Floor of first differences of Pi*10^n. 0
 3, 28, 282, 2827, 28274, 282743, 2827433, 28274333, 282743338, 2827433388, 28274333882, 282743338823, 2827433388230, 28274333882308, 282743338823081, 2827433388230813, 28274333882308139, 282743338823081391, 2827433388230813914 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 COMMENTS For n>0, a(n) = decimal expansion of 9*Pi truncated to n-1 places. This sequence is not the same as the first differences of A011545: 3, 28, 283, 2827, 28274, 282744, 2827433, 28274334, 282743339, 2827433388, ... LINKS Table of n, a(n) for n=0..18. FORMULA a(0)=3, a(n)=floor(Pi*10^n-Pi*10^(n-1)) for n>0. EXAMPLE a(2)=floor(Pi*10^2-Pi*10^1) = 282. MATHEMATICA Join[{3}, Differences[Pi*10^Range[0, 20]]//Floor] (* Harvey P. Dale, Oct 19 2018 *) PROG (PARI) a(n) = if (n==0, 3, floor(Pi*10^n-Pi*10^(n-1))); \\ Michel Marcus, Mar 18 2014 CROSSREFS Cf. A011545. Sequence in context: A198887 A026114 A181069 * A287884 A250890 A199754 Adjacent sequences: A239294 A239295 A239296 * A239298 A239299 A239300 KEYWORD nonn AUTHOR Jeremy Gardiner, Mar 14 2014 STATUS approved

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Last modified June 10 04:13 EDT 2023. Contains 363187 sequences. (Running on oeis4.)