1/8 the number of n X n arrays of squares of integers with every 2X2 subblock summing to 31.

A159230

1/8 the number of n X n arrays of squares of integers with every 2X2 subblock summing to 31.

Terms

    a(0) =2a(1) =5a(2) =10a(3) =20a(4) =38a(5) =74a(6) =142a(7) =278a(8) =542a(9) =1070a(10) =2110a(11) =4190a(12) =8318a(13) =16574a(14) =33022a(15) =65918a(16) =131582a(17) =262910a(18) =525310a(19) =1050110a(20) =2099198a(21) =4197374a(22) =8392702a(23) =16783358a(24) =33562622a(25) =67121150a(26) =134234110

External references