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A254565 Number of (n+2)X(5+2) 0..1 arrays with every 3X3 subblock sum of the four sums of the central row, central column, diagonal and antidiagonal nondecreasing horizontally and vertically 1
116056, 536906, 2647806, 4796417, 10679860, 25591173, 45085796, 101378800, 196258426, 401333712, 788651082, 1539724687, 2943252490, 5549226489, 10301160312, 18857921168, 34041174352, 60655369674, 106683727874 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A254568

LINKS

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

R. H. Hardin, polynomial of degree 23 plus a quasipolynomial of degree 11 with period 6

FORMULA

Empirical: a(n) = 11*a(n-1) -54*a(n-2) +166*a(n-3) -407*a(n-4) +945*a(n-5) -2046*a(n-6) +3894*a(n-7) -6831*a(n-8) +11693*a(n-9) -18832*a(n-10) +27864*a(n-11) -39776*a(n-12) +55384*a(n-13) -71820*a(n-14) +87780*a(n-15) -105621*a(n-16) +120879*a(n-17) -127006*a(n-18) +128678*a(n-19) -126225*a(n-20) +109087*a(n-21) -81818*a(n-22) +55242*a(n-23) -21186*a(n-24) -21186*a(n-25) +55242*a(n-26) -81818*a(n-27) +109087*a(n-28) -126225*a(n-29) +128678*a(n-30) -127006*a(n-31) +120879*a(n-32) -105621*a(n-33) +87780*a(n-34) -71820*a(n-35) +55384*a(n-36) -39776*a(n-37) +27864*a(n-38) -18832*a(n-39) +11693*a(n-40) -6831*a(n-41) +3894*a(n-42) -2046*a(n-43) +945*a(n-44) -407*a(n-45) +166*a(n-46) -54*a(n-47) +11*a(n-48) -a(n-49) for n>63

polynomial of degree 23 plus a quasipolynomial of degree 11 with period 6 for n>14 (see link above)

EXAMPLE

Some solutions for n=1

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

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

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

CROSSREFS

Sequence in context: A064556 A255950 A273660 * A237479 A154065 A206471

Adjacent sequences:  A254562 A254563 A254564 * A254566 A254567 A254568

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 01 2015

STATUS

approved

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Last modified September 22 03:54 EDT 2020. Contains 337289 sequences. (Running on oeis4.)