A convolution triangle of numbers based on A001906 (even-indexed Fibonacci numbers).

Terms

a(0) =1a(1) =3a(2) =1a(3) =8a(4) =6a(5) =1a(6) =21a(7) =25a(8) =9a(9) =1a(10) =55a(11) =90a(12) =51a(13) =12a(14) =1a(15) =144a(16) =300a(17) =234a(18) =86a(19) =15a(20) =1a(21) =377a(22) =954a(23) =951a(24) =480a(25) =130a(26) =18a(27) =1a(28) =987a(29) =2939