Number of n-length words w over 5-ary alphabet such that for every prefix z of w we have #(z,a_i) = 0 or #(z,a_i) >= #(z,a_j) for all j>i and #(z,a_i) counts the occurrences of the i-th letter in z.
A213293
Number of n-length words w over 5-ary alphabet such that for every prefix z of w we have #(z,a_i) = 0 or #(z,a_i) >= #(z,a_j) for all j>i and #(z,a_i) counts the occurrences of the i-th letter in z.
Terms
- a(0) =1a(1) =5a(2) =25a(3) =95a(4) =315a(5) =895a(6) =2535a(7) =7280a(8) =21562a(9) =64924a(10) =201975a(11) =640915a(12) =2095019a(13) =6978713a(14) =23859310a(15) =82982260a(16) =295202798a(17) =1066467105a(18) =3928481530a(19) =14672457970a(20) =55722273963a(21) =214254166369a(22) =835669136725
External references
- oeis: A213293