Number of permutations of length n which avoid the patterns 1432, 2314, 2413.

Terms

a(0) =1a(1) =2a(2) =6a(3) =21a(4) =75a(5) =263a(6) =904a(7) =3066a(8) =10324a(9) =34652a(10) =116179a(11) =389443a(12) =1305592a(13) =4377595a(14) =14679474a(15) =49227937a(16) =165091510a(17) =553658600a(18) =1856778673a(19) =6226985606a(20) =20883103968a(21) =70034469898a(22) =234870470627a(23) =787671056978