Number of n X n arrays of squares of integers with every (n-1)X(n-1) subblock summing to 6 and every element equal to at least one neighbor.

A146198

Number of n X n arrays of squares of integers with every (n-1)X(n-1) subblock summing to 6 and every element equal to at least one neighbor.

Terms

    a(0) =0a(1) =40a(2) =5606a(3) =41698a(4) =158360a(5) =453388a(6) =1097036a(7) =2364072a(8) =4672136a(9) =8626500a(10) =15071228a(11) =25146736a(12) =40353752a(13) =62623676a(14) =94395340a(15) =138698168a(16) =199241736a(17) =280511732a(18) =387872316a(19) =527674880a(20) =707373208

External references