Even Padovan numbers divided by 2.

Terms

a(0) =0a(1) =0a(2) =0a(3) =1a(4) =1a(5) =2a(6) =6a(7) =8a(8) =14a(9) =43a(10) =57a(11) =100a(12) =308a(13) =408a(14) =716a(15) =2205a(16) =2921a(17) =5126a(18) =15786a(19) =20912a(20) =36698a(21) =113015a(22) =149713a(23) =262728a(24) =809096a(25) =1071824a(26) =1880920a(27) =5792473a(28) =7673393a(29) =13465866