Number of Motzkin meanders of length n with an even number of humps and an even number of peaks.

A325921

Number of Motzkin meanders of length n with an even number of humps and an even number of peaks.

Terms

    a(0) =1a(1) =2a(2) =4a(3) =8a(4) =17a(5) =38a(6) =92a(7) =239a(8) =653a(9) =1832a(10) =5192a(11) =14726a(12) =41683a(13) =117822a(14) =333312a(15) =945952a(16) =2698117a(17) =7740920a(18) =22337788a(19) =64788768a(20) =188683267a(21) =551179370a(22) =1613612996a(23) =4731245903a(24) =13888157307a(25) =40804653640a(26) =119984904744a(27) =353085202434

External references