Number of nonnegative integer arrays of length n+2 with new values 0 upwards introduced in order, no three adjacent elements equal, and containing the value 2.
A211829
Number of nonnegative integer arrays of length n+2 with new values 0 upwards introduced in order, no three adjacent elements equal, and containing the value 2.
Terms
- a(0) =1a(1) =7a(2) =33a(3) =146a(4) =664a(5) =3199a(6) =16479a(7) =90774a(8) =532870a(9) =3319142a(10) =21844498a(11) =151329352a(12) =1099821989a(13) =8361242674a(14) =66320784806a(15) =547602705993
External references
- oeis: A211829