OFFSET
1,2
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..80
Cyril Banderier, Philippe Marchal, Michael Wallner, Rectangular Young tableaux with local decreases and the density method for uniform random generation (short version), arXiv:1805.09017 [cs.DM], 2018.
Robert Coquereaux and Jean-Bernard Zuber, Counting partitions by genus. II. A compendium of results, arXiv:2305.01100 [math.CO], 2023. See p. 17.
FORMULA
a(n) = (7n)!/(n!(7!)^n). - Christian G. Bower, Sep 15 1998
MATHEMATICA
Table[(7n)!/(n!(7!)^n), {n, 1, 10}] (* Vincenzo Librandi, Jun 26 2012 *)
PROG
(Sage) [rising_factorial(n+1, 6*n)/5040^n for n in (0..15)] # Peter Luschny, Jun 26 2012
(Magma)[Factorial(7*n)/(Factorial(n)*Factorial(7)^n): n in [1..10]] // Vincenzo Librandi, Jun 26 2012
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved