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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
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
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
KEYWORD
nonn
AUTHOR
Lekraj Beedassy, Oct 17 2002
STATUS
approved