Number of permutations of length n which avoid the patterns 1432, 2134, 2314.

Terms

a(0) =1a(1) =2a(2) =6a(3) =21a(4) =73a(5) =241a(6) =768a(7) =2415a(8) =7587a(9) =23905a(10) =75507a(11) =238759a(12) =755088a(13) =2387570a(14) =7548085a(15) =23860518a(16) =75425046a(17) =238427267a(18) =753705647a(19) =2382596754a(20) =7531821990a(21) =23809446690a(22) =75265885442a(23) =237928695207a(24) =752134317626