The OEIS is supported by the many generous donors to the OEIS Foundation.

 Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 59th year, we have over 358,000 sequences, and we’ve crossed 10,300 citations (which often say “discovered thanks to the OEIS”). Other ways to Give
 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A075891 Quotient C[p(n),{p(n)+-1}/2]/p(n), where p(n)=n-th prime. 0
 1, 2, 5, 42, 132, 1430, 4862, 58786, 2674440, 9694845, 477638700, 6564120420, 24466267020, 343059613650, 18367353072152, 1002242216651368, 3814986502092304, 212336130412243110, 3116285494907301262 (list; graph; refs; listen; history; text; internal format)
 OFFSET 2,2 COMMENTS A prime p divides all the binomial coefficients (save the extremes) in the p-th row of Pascal's triangle. Same as Catalan( (p(n) - 1) / 2). - Jonathan Sondow, May 24 2013 LINKS FORMULA a(n) = A000108( (A000040(n) - 1) / 2). - Jonathan Sondow, May 24 2013 CROSSREFS Cf. A000108. Sequence in context: A042447 A176266 A075872 * A246669 A208302 A273398 Adjacent sequences: A075888 A075889 A075890 * A075892 A075893 A075894 KEYWORD nonn AUTHOR Lekraj Beedassy, Oct 17 2002 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified December 3 14:49 EST 2022. Contains 358534 sequences. (Running on oeis4.)