Number of 4Xn arrays containing n copies of 0..4-1 with every element equal to or 1 greater than any west or southwest neighbors modulo 4 and the upper left element equal to 0.
A267568
Number of 4Xn arrays containing n copies of 0..4-1 with every element equal to or 1 greater than any west or southwest neighbors modulo 4 and the upper left element equal to 0.
Terms
- a(0) =6a(1) =2a(2) =3a(3) =15a(4) =170a(5) =1614a(6) =11048a(7) =60954a(8) =299110a(9) =1494098a(10) =8772195a(11) =61209175a(12) =450621524a(13) =3191383332a(14) =21167733740a(15) =133174852936a(16) =820343904175
External references
- oeis: A267568