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 A245000 Number of standard Young tableaux with 2n cells and n as last value in the first row. 2
 1, 1, 2, 10, 66, 596, 6620, 87000, 1324715, 22908742, 443117232, 9479624946, 222233111144, 5664313424130, 155929751451474, 4610317083986067, 145702128028870279, 4901223985261545846, 174836302846627038524, 6591979801098305644386, 261927409786051251544292 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 COMMENTS Also the number of ballot sequences of length 2n where n is the position of the last occurrence of the minimal value. LINKS Joerg Arndt and Alois P. Heinz, Table of n, a(n) for n = 0..25 Wikipedia, Young tableau FORMULA a(n) = A238794(2n,n). EXAMPLE a(2) = 2: [1 2]   [1 2] [3]     [3 4] [4] CROSSREFS Cf. A238794. Sequence in context: A277493 A108205 A228938 * A108397 A325995 A049036 Adjacent sequences:  A244997 A244998 A244999 * A245001 A245002 A245003 KEYWORD nonn AUTHOR Joerg Arndt and Alois P. Heinz, Jul 09 2014 STATUS approved

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Last modified January 20 04:18 EST 2021. Contains 340301 sequences. (Running on oeis4.)