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A152766
Largest proper divisor of the Catalan number A000108(n).
2
1, 1, 7, 21, 66, 143, 715, 2431, 8398, 29393, 104006, 371450, 1337220, 3231615, 17678835, 64822395, 238819350, 883631595, 3282060210, 12233133510, 45741281820, 171529806825, 644952073662, 2430973200726, 9183676536076, 34766775458002, 131873975875180
OFFSET
2,3
LINKS
FORMULA
a(n) = A032742(A000108(n)). - Amiram Eldar, Dec 01 2019
MATHEMATICA
Divisors[CatalanNumber[#]][[-2]]&/@Range[2, 40] (* Harvey P. Dale, Jun 13 2011 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Omar E. Pol, Dec 15 2008
EXTENSIONS
Edited and extended by N. J. A. Sloane, Dec 19 2008
STATUS
approved