login
Number of permutations of 0..(n-1) representable as 1,2,1-weighted consecutive sums of 3 adjacent elements of a sequence of n+2 nonnegative integers.
0

%I #10 Nov 08 2024 08:41:15

%S 1,2,4,6,12,36,102,324,972,3190,12610,50254,214510,1000260,4848796,

%T 24798190,134817190

%N Number of permutations of 0..(n-1) representable as 1,2,1-weighted consecutive sums of 3 adjacent elements of a sequence of n+2 nonnegative integers.

%K nonn,more

%O 1,2

%A _R. H. Hardin_, Aug 15 2010