Number of n X n 0..1 arrays with no element equal to more than one of its horizontal and vertical neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.
A280434
Number of n X n 0..1 arrays with no element equal to more than one of its horizontal and vertical neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.
Terms
- a(0) =0a(1) =4a(2) =21a(3) =80a(4) =225a(5) =548a(6) =1211a(7) =2512a(8) =4989a(9) =9604a(10) =18073a(11) =33432a(12) =61035a(13) =110276a(14) =197581a(15) =351568a(16) =621945
External references
- oeis: A280434