A269120 - OEIS

%I #6 Mar 02 2016 21:05:16

%S 0,0,1,1004849563,7541872062618216079,370243779118368267931211789686,

%T 91050643996464879303067913358954122530151,

%U 90098061524165913059428708258834814271005531460359720,302407545158616421950876578542740909974755462890611522604756347847

%N Number of sequences with 10 copies each of 1,2,...,n avoiding the pattern 12...n.

%H Alois P. Heinz, <a href="/A269120/b269120.txt">Table of n, a(n) for n = 0..60</a>

%F a(n) = (10*n)!/10!^n - A268853(n).

%Y Column k=10 of A269129.

%Y Cf. A268853.

%K nonn

%O 0,4

%A _Alois P. Heinz_, Feb 19 2016