Number of (n+2)X(1+2) 0..1 arrays with no 3x3 subblock diagonal sum less than the antidiagonal sum or central row sum less than the central column sum.
A258887
Number of (n+2)X(1+2) 0..1 arrays with no 3x3 subblock diagonal sum less than the antidiagonal sum or central row sum less than the central column sum.
Terms
- a(0) =242a(1) =900a(2) =3036a(3) =10201a(4) =30870a(5) =94249a(6) =271350a(7) =786769a(8) =2190720a(9) =6135529a(10) =16733464a(11) =45832900a(12) =123292328a(13) =332697600a(14) =886883128a(15) =2369450329a(16) =6278170990a(17) =16660871929a(18) =43967201252a(19) =116153500969a(20) =305698600640a(21) =805156263025
External references
- oeis: A258887