Number of permutations p of [n] such that p(i)-i is a multiple of ten for all i in [n].

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =1a(8) =1a(9) =1a(10) =1a(11) =2a(12) =4a(13) =8a(14) =16a(15) =32a(16) =64a(17) =128a(18) =256a(19) =512a(20) =1024a(21) =3072a(22) =9216a(23) =27648a(24) =82944a(25) =248832a(26) =746496a(27) =2239488a(28) =6718464a(29) =20155392