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A227669 Number of lattice paths from {n}^7 to {0}^7 using steps that decrement one component by 1 such that for each point (p_1,p_2,...,p_7) we have abs(p_{i}-p_{i+1}) <= 1. 2
1, 5040, 93770800, 1891074940160, 38746316631586896, 796655971557156062816, 16391903881902996952724768, 337320253484345016223956919936, 6941648177366735193973359263017216, 142850870919946441196223189856661775872, 2939698583689917131062885788617101100432640 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
LINKS
EXAMPLE
a(1) = 7! = 5040.
CROSSREFS
Column k=7 of A227655.
Cf. A000142.
Sequence in context: A221437 A221622 A318714 * A010800 A172544 A287083
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Jul 19 2013
STATUS
approved

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Last modified April 15 02:01 EDT 2024. Contains 371667 sequences. (Running on oeis4.)