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

A275038

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

Terms

    a(0) =3a(1) =18a(2) =46a(3) =137a(4) =401a(5) =1152a(6) =3336a(7) =9720a(8) =28277a(9) =82174a(10) =238829a(11) =694135a(12) =2017380a(13) =5863430a(14) =17042197a(15) =49533046a(16) =143966504a(17) =418434888a(18) =1216170841a(19) =3534771986a(20) =10273734201a(21) =29860375290a(22) =86788495974a(23) =252248762928a(24) =733155217213

External references