a(n) is the number of exterior top arches (no covering arch) for semi-meanders in generation n+1 that are generated by semi-meanders with n top arches and floor((n+2)/2) exterior top arches using the exterior arch splitting algorithm.
A365679
a(n) is the number of exterior top arches (no covering arch) for semi-meanders in generation n+1 that are generated by semi-meanders with n top arches and floor((n+2)/2) exterior top arches using the exterior arch splitting algorithm.
Terms
- a(0) =4a(1) =10a(2) =14a(3) =32a(4) =40a(5) =88a(6) =104a(7) =224a(8) =256a(9) =544a(10) =608a(11) =1280a(12) =1408a(13) =2944a(14) =3200a(15) =6656a(16) =7168a(17) =14848a(18) =15872a(19) =32768a(20) =34816a(21) =71680a(22) =75776a(23) =155648a(24) =163840a(25) =335872a(26) =352256a(27) =720896a(28) =753664a(29) =1540096
External references
- oeis: A365679