Number of nX3 0..1 arrays with every element equal to 0, 1, 2 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
A302618
Number of nX3 0..1 arrays with every element equal to 0, 1, 2 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =4a(1) =17a(2) =25a(3) =71a(4) =191a(5) =498a(6) =1321a(7) =3505a(8) =9240a(9) =24460a(10) =64759a(11) =171268a(12) =453200a(13) =1199361a(14) =3173346a(15) =8396961a(16) =22219739a(17) =58794851a(18) =155576745a(19) =411673594a(20) =1089327367a(21) =2882467725a(22) =7627305260a(23) =20182608868a(24) =53405199549a(25) =141315536296a(26) =373935069260
External references
- oeis: A302618