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

A194716

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

Terms

    a(0) =0a(1) =1a(2) =35a(3) =181a(4) =523a(5) =1145a(6) =2131a(7) =3565a(8) =5531a(9) =8113a(10) =11395a(11) =15461a(12) =20395a(13) =26281a(14) =33203a(15) =41245a(16) =50491a(17) =61025a(18) =72931a(19) =86293a(20) =101195a(21) =117721a(22) =135955a(23) =155981a(24) =177883a(25) =201745a(26) =227651a(27) =255685a(28) =285931a(29) =318473

External references