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 A305401 Square array A(n,k), n >= 0, k >= 0, read by antidiagonals, where A(n,k) is Sum_{j=0..floor(n/2)} ((n-j)!/j!)*binomial(n-j,j)*k^(n-2*j). 3
 1, 1, 0, 1, 1, 1, 1, 2, 3, 0, 1, 3, 9, 10, 1, 1, 4, 19, 56, 43, 0, 1, 5, 33, 174, 457, 225, 1, 1, 6, 51, 400, 2107, 4626, 1393, 0, 1, 7, 73, 770, 6433, 31779, 55969, 9976, 1, 1, 8, 99, 1320, 15451, 129060, 574129, 788192, 81201, 0, 1, 9, 129, 2086, 31753, 387045, 3103873, 12088488, 12667041, 740785, 1 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 0,8 LINKS Seiichi Manyama, Antidiagonals n = 0..139, flattened FORMULA A(n,k) = k*n*A(n-1,k) + A(n-2,k) for n>1. EXAMPLE Square array begins:    1,  1,   1,    1,    1,     1, ...    0,  1,   2,    3,    4,     5, ...    1,  3,   9,   19,   33,    51, ...    0, 10,  56,  174,  400,   770, ...    1, 43, 457, 2107, 6433, 15451, ... CROSSREFS Columns k=0-3 give A059841, A001040(n+1), A036243, A305459. Rows n=0-2 give A000012, A001477, A058331. Main diagonal gives A305465. Cf. A305466. Sequence in context: A143325 A307910 A128888 * A306100 A294046 A320079 Adjacent sequences:  A305398 A305399 A305400 * A305402 A305403 A305404 KEYWORD nonn,tabl AUTHOR Seiichi Manyama, Jun 02 2018 STATUS approved

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Last modified April 6 20:39 EDT 2020. Contains 333286 sequences. (Running on oeis4.)