Number of lower triangles of a 4 X 4 0..n array with each element differing from all of its horizontal and vertical neighbors by one.

A195000

Number of lower triangles of a 4 X 4 0..n array with each element differing from all of its horizontal and vertical neighbors by one.

Terms

    a(0) =2a(1) =80a(2) =248a(3) =458a(4) =672a(5) =888a(6) =1104a(7) =1320a(8) =1536a(9) =1752a(10) =1968a(11) =2184a(12) =2400a(13) =2616a(14) =2832a(15) =3048a(16) =3264a(17) =3480a(18) =3696a(19) =3912a(20) =4128a(21) =4344a(22) =4560a(23) =4776a(24) =4992a(25) =5208a(26) =5424a(27) =5640a(28) =5856a(29) =6072

External references