Number of n X 4 integer arrays with each element equal to the number of horizontal and antidiagonal neighbors not equal to itself.

A265988

Number of n X 4 integer arrays with each element equal to the number of horizontal and antidiagonal neighbors not equal to itself.

Terms

    a(0) =1a(1) =2a(2) =2a(3) =2a(4) =7a(5) =7a(6) =21a(7) =35a(8) =78a(9) =158a(10) =323a(11) =682a(12) =1395a(13) =2920a(14) =6035a(15) =12551a(16) =26048a(17) =54067a(18) =112291a(19) =233073a(20) =483986a(21) =1004757a(22) =2086142a(23) =4331198a(24) =8992360a(25) =18669984a(26) =38762260a(27) =80478161a(28) =167087798a(29) =346906568

External references