Number of n X 3 0..1 arrays with every element equal to 0, 1, 4 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

A302510

Number of n X 3 0..1 arrays with every element equal to 0, 1, 4 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Terms

    a(0) =3a(1) =3a(2) =11a(3) =9a(4) =14a(5) =21a(6) =28a(7) =37a(8) =51a(9) =72a(10) =100a(11) =137a(12) =188a(13) =260a(14) =360a(15) =497a(16) =685a(17) =945a(18) =1305a(19) =1802a(20) =2487a(21) =3432a(22) =4737a(23) =6539a(24) =9026a(25) =12458a(26) =17195a(27) =23734a(28) =32760a(29) =45218

External references