Triangle of Generalized Runyon numbers R_{n,k}^(4) read by rows.

Terms

a(0) =1a(1) =1a(2) =4a(3) =1a(4) =12a(5) =22a(6) =1a(7) =24a(8) =120a(9) =140a(10) =1a(11) =40a(12) =380a(13) =1140a(14) =969a(15) =1a(16) =60a(17) =920a(18) =5060a(19) =10626a(20) =7084a(21) =1a(22) =84a(23) =1890a(24) =16380a(25) =61425a(26) =98280a(27) =53820a(28) =1a(29) =112