Number of nonnegative integer arrays of length n+3 with new values 0 upwards introduced in order, no three adjacent elements equal, and containing the value 3.
A211830
Number of nonnegative integer arrays of length n+3 with new values 0 upwards introduced in order, no three adjacent elements equal, and containing the value 3.
Terms
- a(0) =1a(1) =11a(2) =77a(3) =461a(4) =2621a(5) =14862a(6) =86295a(7) =520534a(8) =3285279a(9) =21751723a(10) =151075466a(11) =1099127680a(12) =8359344687a(13) =66315597630a(14) =547588531486
External references
- oeis: A211830