Number of 3 X n 0..2 arrays with no element equal to any value at offset (-2,0) (-1,2) or (0,-2) and new values introduced in order 0..2.

A275566

Number of 3 X n 0..2 arrays with no element equal to any value at offset (-2,0) (-1,2) or (0,-2) and new values introduced in order 0..2.

Terms

    a(0) =3a(1) =54a(2) =126a(3) =294a(4) =672a(5) =1536a(6) =3552a(7) =8214a(8) =19092a(9) =44376a(10) =103200a(11) =240000a(12) =558000a(13) =1297350a(14) =3015990a(15) =7011366a(16) =16299318a(17) =37891014a(18) =88085676a(19) =204773784a(20) =476041212a(21) =1106661366a(22) =2572675992a(23) =5980747104a(24) =13903551072a(25) =32321836896a(26) =75139155000

External references