Number of perfect rhythmic tilings of [0,4n-1] with quadruplets.

Terms

a(0) =1a(1) =1a(2) =0a(3) =0a(4) =0a(5) =0a(6) =0a(7) =0a(8) =0a(9) =0a(10) =0a(11) =0a(12) =0a(13) =0a(14) =0a(15) =2a(16) =2a(17) =24a(18) =38a(19) =96a(20) =444a(21) =1414a(22) =5134a(23) =19490