The matrix-vector product A133080 * A000108.

Terms

a(0) =1a(1) =2a(2) =2a(3) =7a(4) =14a(5) =56a(6) =132a(7) =561a(8) =1430a(9) =6292a(10) =16796a(11) =75582a(12) =208012a(13) =950912a(14) =2674440a(15) =12369285a(16) =35357670a(17) =165002460a(18) =477638700a(19) =2244901890a(20) =6564120420a(21) =31030387440a(22) =91482563640a(23) =434542177290