A254583 - OEIS

A254583

Number of (n+2)X(5+2) 0..1 arrays with every 3X3 subblock sum of the two medians of the central row and the central column and the two maximums of the diagonal and antidiagonal nondecreasing horizontally, vertically and ne-to-sw antidiagonally

332330, 3083065, 45867931, 613720640, 7610621332, 96984109170, 1242236438386, 15846867693636, 202156220287824, 2580360620297958, 32933420876277090, 420293728693560670, 5363919917385090792, 68457129482764993312

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OFFSET

1,1

COMMENTS

Column 5 of A254586

LINKS

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

FORMULA

Empirical: a(n) = 6*a(n-1) +36*a(n-2) +586*a(n-3) +1870*a(n-4) -7096*a(n-5) -68287*a(n-6) -422500*a(n-7) -100964*a(n-8) +7219900*a(n-9) +25866956*a(n-10) +19857152*a(n-11) -353526399*a(n-12) -1191439170*a(n-13) +1727044172*a(n-14) +10143478250*a(n-15) -399198586*a(n-16) -34745727656*a(n-17) -22239862209*a(n-18) +23155580224*a(n-19) +42379877972*a(n-20) +153063587856*a(n-21) +105846149632*a(n-22) -351123642944*a(n-23) -276225752576*a(n-24) +144721758976*a(n-25) -244435668992*a(n-26) +142563325952*a(n-27) +515080914944*a(n-28) -63535329280*a(n-29) +590207082496*a(n-30) +168482045952*a(n-31) -387089498112*a(n-32) -29854138368*a(n-33) -319326519296*a(n-34) -127765839872*a(n-35) -15464398848*a(n-36) -33940307968*a(n-37) +10267656192*a(n-38) for n>46

EXAMPLE

Some solutions for n=1

..0..0..1..0..1..0..1....0..0..0..1..1..0..0....0..0..1..0..0..1..1

..1..0..0..0..0..1..0....1..0..0..1..0..1..1....0..0..0..0..0..0..1

..1..1..0..1..1..0..0....0..1..1..0..1..0..0....1..0..0..1..1..1..1

CROSSREFS

Sequence in context: A013913 A258897 A237331 * A254590 A254358 A206658

Adjacent sequences: A254580 A254581 A254582 * A254584 A254585 A254586

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 01 2015

STATUS

approved