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A214279 Number of compositions of n where the difference between largest and smallest parts equals 10 and adjacent parts are unequal. 2

%I #9 Jan 03 2019 15:59:49

%S 0,2,1,8,12,23,56,100,196,380,734,1365,2588,4852,8987,16728,30868,

%T 56876,104463,191425,349855,638239,1162173,2112115,3833245,6946126,

%U 12570162,22719408,41016345,73967704,133257636,239847038,431310105,774970862,1391362755

%N Number of compositions of n where the difference between largest and smallest parts equals 10 and adjacent parts are unequal.

%H Alois P. Heinz, <a href="/A214279/b214279.txt">Table of n, a(n) for n = 11..2000</a>

%e a(12) = 2: [11,1], [1,11].

%e a(13) = 1: [1,11,1].

%e a(14) = 8: [2,12], [2,11,1], [2,1,11], [12,2], [11,2,1], [11,1,2], [1,2,11], [1,11,2].

%e a(15) = 12: [3,11,1], [3,1,11], [2,1,11,1], [11,3,1], [11,1,3], [11,1,2,1], [1,3,11], [1,2,11,1], [1,2,1,11], [1,11,3], [1,11,2,1], [1,11,1,2].

%Y Column k=10 of A214269.

%K nonn

%O 11,2

%A _Alois P. Heinz_, Jul 09 2012

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