%I #5 Apr 03 2013 11:56:24
%S 0,0,0,1,10,71,444,2617,14958,84063,467960,2591265,14308722,78911943,
%T 435066228,2399404345,13242035030,73150006271,404525810928,
%U 2239684086529,12415205896794,68905402034311,382897019146540,2130255439081721,11865617032955070
%N Number of permutations of length n avoiding 1234 and containing exactly 1 occurrence of 1243.
%C a(n) is also the number of permutations of length n avoiding 1243 and containing exactly 1 occurrence of 1234.
%H B. Nakamura, <a href="http://arxiv.org/abs/1301.5080">Approaches for enumerating permutations with a prescribed number of occurrences of patterns</a>, arXiv 1301.5080, 2013.
%p # Programs can be obtained from author's personal website.
%Y Cf. A006318.
%K nonn
%O 1,5
%A _Brian Nakamura_, Apr 03 2013