A254162 Number of (n+2)X(2+2) 0..1 arrays with every 3X3 subblock diagonal maximum minus antidiagonal median nondecreasing horizontally, vertically and ne-to-sw antidiagonally

3036, 23660, 164684, 1014816, 6159516, 36538548, 217539476, 1297596948, 7773465716, 46667868056, 280531517204, 1687013713288, 10146685732748, 61029056245012, 367072960100780, 2207831773493064, 13279454483043468

Offset

1,1

Comments

Column 2 of A254168

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Formula

Empirical: a(n) = 9*a(n-1) -15*a(n-2) -35*a(n-3) +120*a(n-4) -94*a(n-5) -141*a(n-6) +965*a(n-7) -263*a(n-8) -13931*a(n-9) +36104*a(n-10) -32494*a(n-11) +2541*a(n-12) +15355*a(n-13) -2033*a(n-14) +9491*a(n-15) -68712*a(n-16) +106622*a(n-17) -75887*a(n-18) +25367*a(n-19) -33645*a(n-20) +72871*a(n-21) -56744*a(n-22) -62522*a(n-23) +205648*a(n-24) -243552*a(n-25) +197908*a(n-26) -168492*a(n-27) +219664*a(n-28) -125816*a(n-29) -184896*a(n-30) +410240*a(n-31) -367264*a(n-32) +183040*a(n-33) -175488*a(n-34) +175744*a(n-35) +44544*a(n-36) -273920*a(n-37) +287232*a(n-38) -115712*a(n-39) +45056*a(n-40) -61440*a(n-41) +8192*a(n-42) +65536*a(n-43) -81920*a(n-44) +32768*a(n-45) for n>53

Example

Some solutions for n=3
..0..0..1..0....0..1..1..0....0..0..1..1....0..0..1..1....0..0..0..1
..1..0..1..0....0..1..0..1....1..0..0..0....0..0..1..1....1..1..1..1
..0..1..0..0....1..0..0..0....1..1..1..1....1..0..0..1....1..0..0..0
..1..0..0..0....1..0..1..0....1..0..0..1....0..0..0..0....1..1..1..0
..1..1..0..0....0..0..0..1....0..0..0..1....1..0..0..1....0..0..1..1

Crossrefs

Sequence in context: A084719 A258889 A254169 * A254451 A205929 A145049

Adjacent sequences: A254159 A254160 A254161 * A254163 A254164 A254165

Keyword

nonn

Author

R. H. Hardin, Jan 26 2015

Status

approved