Number of n X 4 0..4 arrays with each element equal to the number its horizontal and vertical neighbors within one of itself.

A196013

Number of n X 4 0..4 arrays with each element equal to the number its horizontal and vertical neighbors within one of itself.

Terms

    a(0) =1a(1) =1a(2) =7a(3) =25a(4) =27a(5) =91a(6) =231a(7) =455a(8) =1135a(9) =2693a(10) =6041a(11) =14257a(12) =33349a(13) =76941a(14) =179553a(15) =418345a(16) =971503a(17) =2261807a(18) =5264419a(19) =12243481a(20) =28490729a(21) =66295633a(22) =154236017a(23) =358872825a(24) =835013523a(25) =1942797397a(26) =4520363539a(27) =10517663443a(28) =24471508585a(29) =56938341019

External references