Number of nonnegative integer arrays of length n+3 with new values 0 upwards introduced in order, no three adjacent elements all unequal, and containing the value 2.
A211842
Number of nonnegative integer arrays of length n+3 with new values 0 upwards introduced in order, no three adjacent elements all unequal, and containing the value 2.
Terms
- a(0) =1a(1) =5a(2) =19a(3) =63a(4) =196a(5) =588a(6) =1731a(7) =5049a(8) =14689a(9) =42809a(10) =125364a(11) =369678a(12) =1099339a(13) =3300091a(14) =10006487a(15) =30658799a(16) =94932890a(17) =297079702a(18) =939477265a(19) =3001846219a(20) =9689289277a(21) =31586215805a(22) =103968208826a(23) =345457027212
External references
- oeis: A211842