Number of tilings of a 3 X n rectangle using V (2m+1)-ominoes (m >= 0) in standard orientation.

Terms

a(0) =1a(1) =1a(2) =3a(3) =8a(4) =18a(5) =44a(6) =107a(7) =257a(8) =621a(9) =1500a(10) =3620a(11) =8740a(12) =21101a(13) =50941a(14) =122983a(15) =296908a(16) =716798a(17) =1730504a(18) =4177807a(19) =10086117a(20) =24350041a(21) =58786200a(22) =141922440a(23) =342631080a(24) =827184601a(25) =1997000281a(26) =4821185163a(27) =11639370608a(28) =28099926378a(29) =67839223364