Number of 4Xn integer arrays with each element equal to the number of horizontal and antidiagonal neighbors equal to itself.

A266014

Number of 4Xn integer arrays with each element equal to the number of horizontal and antidiagonal neighbors equal to itself.

Terms

    a(0) =1a(1) =1a(2) =14a(3) =9a(4) =27a(5) =61a(6) =75a(7) =281a(8) =697a(9) =1182a(10) =3379a(11) =8083a(12) =17008a(13) =44193a(14) =103747a(15) =232714a(16) =571581a(17) =1342911a(18) =3114718a(19) =7472335a(20) =17554474a(21) =41147561a(22) =97770072a(23) =230189903a(24) =541916214a(25) =1282131187a(26) =3021086562a(27) =7122374217a(28) =16823787888a(29) =39666365638

External references