Number of compositions of 2*n with n maximal runs.

Terms

a(0) =1a(1) =2a(2) =4a(3) =14a(4) =36a(5) =99a(6) =274a(7) =813a(8) =2278a(9) =6692a(10) =19206a(11) =56687a(12) =164416a(13) =486052a(14) =1422654a(15) =4214023a(16) =12408476a(17) =36825663a(18) =108926976a(19) =323856358a(20) =961177042a(21) =2862551860a(22) =8518115200a(23) =25407468667a(24) =75763113682a(25) =226297498429a(26) =675951314988