Number of n X 4 0..1 arrays with every element equal to 0, 1, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
A302676
Number of n X 4 0..1 arrays with every element equal to 0, 1, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =5a(1) =5a(2) =12a(3) =20a(4) =33a(5) =64a(6) =121a(7) =231a(8) =440a(9) =838a(10) =1597a(11) =3042a(12) =5796a(13) =11042a(14) =21037a(15) =40079a(16) =76357a(17) =145473a(18) =277150a(19) =528017a(20) =1005960a(21) =1916521a(22) =3651291a(23) =6956316a(24) =13252938a(25) =25249049a(26) =48103634a(27) =91645416a(28) =174599746a(29) =332641529
External references
- oeis: A302676