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A155794 Triangle read by rows: t(n,m)=(m*(m-n))! 0

%I #3 Mar 30 2012 17:34:33

%S 1,1,1,1,1,1,1,2,2,1,1,6,24,6,1,1,24,720,720,24,1,1,120,40320,362880,

%T 40320,120,1,1,720,3628800,479001600,479001600,3628800,720,1,1,5040,

%U 479001600,1307674368000,20922789888000,1307674368000,479001600,5040,1

%N Triangle read by rows: t(n,m)=(m*(m-n))!

%C Row sums are: {1, 2, 3, 6, 38, 1490, 443762, 965262242, 23539096637282, 4878608938121399042, 16752209028723653862101762,...}.

%C Second column is n!.

%e {1},

%e {1, 1},

%e {1, 1, 1},

%e {1, 2, 2, 1},

%e {1, 6, 24, 6, 1},

%e {1, 24, 720, 720, 24, 1},

%e {1, 120, 40320, 362880, 40320, 120, 1},

%e {1, 720, 3628800, 479001600, 479001600, 3628800, 720, 1},

%e {1, 5040, 479001600, 1307674368000, 20922789888000, 1307674368000, 479001600, 5040, 1},

%e {1, 40320, 87178291200, 6402373705728000, 2432902008176640000, 2432902008176640000, 6402373705728000, 87178291200, 40320, 1},

%e {1, 362880, 20922789888000, 51090942171709440000, 620448401733239439360000, 15511210043330985984000000, 620448401733239439360000, 51090942171709440000, 20922789888000, 362880, 1}

%t Table[Table[(k*(n - k))!, {k, 0, n}], {n, 0, 10}];

%t Flatten[%]

%K nonn,tabl

%O 0,8

%A _Roger L. Bagula_, Jan 27 2009

%E Edited by _N. J. A. Sloane_, Jan 31 2009

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Last modified August 15 03:10 EDT 2024. Contains 375172 sequences. (Running on oeis4.)