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A256949 Number of (n+2)X(3+2) 0..1 arrays with every 3X3 subblock sum of the two sums of the central row and central column minus the two minimums of the diagonal and antidiagonal nondecreasing horizontally and vertically 1
10732, 66542, 319819, 1015815, 2663867, 6028589, 12037534, 21294643, 35521186, 57234252, 89676230, 134932398, 198655215, 288520658, 415961574, 589167646, 826254462, 1152482731, 1611607524, 2230360474, 3072644988, 4233869096 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A256954

LINKS

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

FORMULA

Empirical: a(n) = 4*a(n-1) -7*a(n-2) +11*a(n-3) -12*a(n-4) -2*a(n-5) +18*a(n-6) -41*a(n-7) +82*a(n-8) -88*a(n-9) +80*a(n-10) -63*a(n-11) -30*a(n-12) +92*a(n-13) -124*a(n-14) +185*a(n-15) -157*a(n-16) +144*a(n-17) -165*a(n-18) +104*a(n-19) -82*a(n-20) +46*a(n-21) +46*a(n-22) -84*a(n-23) +136*a(n-24) -180*a(n-25) +152*a(n-26) -112*a(n-27) +64*a(n-28) -16*a(n-29) for n>47

EXAMPLE

Some solutions for n=2

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

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

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

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

CROSSREFS

Cf. A256954

Sequence in context: A117090 A255038 A255031 * A146320 A211607 A258513

Adjacent sequences:  A256946 A256947 A256948 * A256950 A256951 A256952

KEYWORD

nonn

AUTHOR

R. H. Hardin, Apr 13 2015

STATUS

approved

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Last modified August 19 07:13 EDT 2022. Contains 356216 sequences. (Running on oeis4.)