Number of 1 X n 0..2 arrays with no element unequal to a strict majority of its horizontal and antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.
A280399
Number of 1 X n 0..2 arrays with no element unequal to a strict majority of its horizontal and antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.
Terms
- a(0) =0a(1) =0a(2) =2a(3) =2a(4) =8a(5) =14a(6) =36a(7) =74a(8) =168a(9) =358a(10) =780a(11) =1666a(12) =3568a(13) =7582a(14) =16084a(15) =33978a(16) =71608a(17) =150486a(18) =315548a(19) =660210a(20) =1378688a(21) =2873870a(22) =5980772a(23) =12427562a(24) =25787208a(25) =53438534a(26) =110605356a(27) =228667234a(28) =472247568a(29) =974321278
External references
- oeis: A280399