Central terms of the triangle in A208101.

Terms

a(0) =1a(1) =2a(2) =3a(3) =14a(4) =20a(5) =110a(6) =154a(7) =910a(8) =1260a(9) =7752a(10) =10659a(11) =67298a(12) =92092a(13) =592020a(14) =807300a(15) =5259150a(16) =7152444a(17) =47071640a(18) =63882940a(19) =423830264a(20) =574221648a(21) =3834669566a(22) =5188082354a(23) =34834267234a(24) =47073334100a(25) =317506779800a(26) =428634152730