Triangle, read by rows, equal to the matrix 4th power of triangle A136220.

Terms

a(0) =1a(1) =4a(2) =1a(3) =24a(4) =8a(5) =1a(6) =198a(7) =76a(8) =12a(9) =1a(10) =2116a(11) =888a(12) =156a(13) =16a(14) =1a(15) =28052a(16) =12542a(17) =2350a(18) =264a(19) =20a(20) =1a(21) =446560a(22) =209506a(23) =41034a(24) =4864a(25) =400a(26) =24a(27) =1a(28) =8325700a(29) =4058806