Number of n X 2 integer arrays with each element equal to the number of horizontal and antidiagonal neighbors less than or equal to itself.
A266049
Number of n X 2 integer arrays with each element equal to the number of horizontal and antidiagonal neighbors less than or equal to itself.
Terms
- a(0) =3a(1) =7a(2) =35a(3) =176a(4) =819a(5) =3927a(6) =18711a(7) =89179a(8) =425184a(9) =2026855a(10) =9662395a(11) =46062279a(12) =219586403a(13) =1046805072a(14) =4990293595a(15) =23789558831a(16) =113408780759a(17) =540638504187
External references
- oeis: A266049