Number of nonnegative integer arrays of length 2n+6 with new values 0 upwards introduced in order, no three adjacent elements all unequal, and containing the value n+1.

A211851

Number of nonnegative integer arrays of length 2n+6 with new values 0 upwards introduced in order, no three adjacent elements all unequal, and containing the value n+1.

Terms

    a(0) =196a(1) =561a(2) =1302a(3) =2619a(4) =4755a(5) =7996a(6) =12671a(7) =19152a(8) =27854a(9) =39235a(10) =53796a(11) =72081a(12) =94677a(13) =122214a(14) =155365a(15) =194846a(16) =241416a(17) =295877a(18) =359074a(19) =431895a(20) =515271a(21) =610176a(22) =717627a(23) =838684a(24) =974450a(25) =1126071a(26) =1294736a(27) =1481677a(28) =1688169a(29) =1915530

External references