A179356 - OEIS

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

%S 1,2,6,24,96,384,1536,6144,24576,98304,380094,1455278,5590035,

%T 21674069,84319556,328215940,1277085588,4967343120,19314847344,

%U 75083658528,291820729296,1134067262088,4407118055652,17128140069700,66573579108036

%N Number of permutations of 1..n with i-9<=p(i)<=i+3

%H R. H. Hardin, <a href="/A179356/b179356.txt">Table of n, a(n) for n=1..400</a>

%K nonn

%O 1,2

%A _R. H. Hardin_ Jul 11 2010