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Number of permutations of 1..n with i-8<=p(i)<=i+3
1

%I #4 Mar 31 2012 12:35:45

%S 1,2,6,24,96,384,1536,6144,24576,93930,354106,1340251,5136061,

%T 19769184,76139584,293044020,1127167248,4333312848,16652629776,

%U 63980000904,245801168580,944477073376,3629633310280,13949610704261,53611516014565

%N Number of permutations of 1..n with i-8<=p(i)<=i+3

%H R. H. Hardin, <a href="/A179350/b179350.txt">Table of n, a(n) for n=1..400</a>

%K nonn

%O 1,2

%A _R. H. Hardin_ Jul 11 2010