Number of permutations of 1..n with displacements restricted to {-5,-4,-2,-1,0,3}.

Terms

a(0) =1a(1) =1a(2) =1a(3) =4a(4) =10a(5) =22a(6) =59a(7) =141a(8) =299a(9) =632a(10) =1428a(11) =3354a(12) =7559a(13) =17051a(14) =39011a(15) =88596a(16) =199718a(17) =450804a(18) =1024183a(19) =2325465a(20) =5263935a(21) =11925661a(22) =27045401a(23) =61298900a(24) =138851955a(25) =314630019a(26) =713229703a(27) =1616454503a(28) =3662850431a(29) =8300898385