The number of domino stacks with n dominos.

Terms

a(0) =1a(1) =2a(2) =5a(3) =11a(4) =23a(5) =45a(6) =85a(7) =154a(8) =272a(9) =468a(10) =788a(11) =1301a(12) =2113a(13) =3377a(14) =5324a(15) =8287a(16) =12749a(17) =19403a(18) =29240a(19) =43655a(20) =64620a(21) =94884a(22) =138271a(23) =200067a(24) =287548a(25) =410660a(26) =582970a(27) =822870a(28) =1155205a(29) =1613398