A374550 - OEIS

%I #7 Jul 17 2024 08:54:39

%S 1,1,2,6,23,102,498,2607,14386,82663,490228,2981407,18507513,

%T 116855873,748427848,4851982365,31784721142,210111119681,

%U 1399977460914,9393523464391,63420812374620,430570197000992,2937789342516835,20135022976572246,138566149670814993

%N Number of length n inversion sequences avoiding the patterns 120 and 201.

%H Benjamin Testart, <a href="/A374550/b374550.txt">Table of n, a(n) for n = 0..350</a>

%H Benjamin Testart, <a href="https://arxiv.org/abs/2407.07701">Completing the enumeration of inversion sequences avoiding one or two patterns of length 3</a>, arXiv:2407.07701 [math.CO], 2024.

%Y Cf. A263777, A263778, A279559, A279566, A279570, A360052, A374546, A374548.

%K nonn

%O 0,3

%A _Benjamin Testart_, Jul 17 2024