Number of n-ary words beginning with the first character of the alphabet, that can be built by inserting six doublets into the initially empty word.

A194718

Number of n-ary words beginning with the first character of the alphabet, that can be built by inserting six doublets into the initially empty word.

Terms

    a(0) =0a(1) =1a(2) =462a(3) =7941a(4) =48838a(5) =185193a(6) =530526a(7) =1265677a(8) =2654646a(9) =5060433a(10) =8960878a(11) =14964501a(12) =23826342a(13) =36463801a(14) =53972478a(15) =77642013a(16) =108971926a(17) =149687457a(18) =201755406a(19) =267399973a(20) =349118598a(21) =449697801a(22) =572229022a(23) =720124461a(24) =897132918a(25) =1107355633a(26) =1355262126a(27) =1645706037

External references