a(n) is the total sum of the last symbol in all Catalan words of length n avoiding the pattern (>=,>=).
A382987
a(n) is the total sum of the last symbol in all Catalan words of length n avoiding the pattern (>=,>=).
Terms
- a(0) =0a(1) =0a(2) =1a(3) =4a(4) =12a(5) =34a(6) =94a(7) =258a(8) =707a(9) =1940a(10) =5337a(11) =14728a(12) =40777a(13) =113268a(14) =315627a(15) =882168a(16) =2472669a(17) =6949344a(18) =19579971a(19) =55296972a(20) =156511626a(21) =443902074a(22) =1261440936a(23) =3591153874a(24) =10240960381a(25) =29251149324a(26) =83675868455a(27) =239703961016a(28) =687596129964
External references
- oeis: A382987