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A252428 Number of (n+2)X(3+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 2 4 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 2 4 6 or 7 1
1142, 1033, 1810, 3954, 9643, 24024, 59977, 153283, 389066, 994207, 2583468, 6641473, 17166060, 45035698, 116572494, 303313550, 800157489, 2078949610, 5429352825, 14366800297, 37404613287, 97882351085, 259440365356 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A252433

LINKS

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

FORMULA

Empirical: a(n) = 32*a(n-3) -310*a(n-6) +1303*a(n-9) -4922*a(n-12) +13079*a(n-15) -25229*a(n-18) +39325*a(n-21) -43233*a(n-24) +23521*a(n-27) -1301*a(n-30) -2920*a(n-33) +769*a(n-36) -101*a(n-39) -22*a(n-42) +11*a(n-45) -a(n-48) for n>51

EXAMPLE

Some solutions for n=4

..2..0..2..2..3....0..2..2..3..2....2..2..0..2..2....1..3..3..1..0

..3..3..1..0..3....2..3..2..2..0....1..3..3..1..3....2..3..2..2..3

..3..2..2..3..2....3..0..1..3..3....2..3..2..2..3....2..2..3..2..2

..2..3..2..2..0....3..2..2..0..2....2..2..3..2..2....1..0..3..1..3

..0..3..1..3..3....2..3..2..2..3....1..3..3..1..3....2..3..2..2..0

..3..2..2..0..2....0..3..1..3..3....2..3..2..2..3....2..2..0..0..2

CROSSREFS

Sequence in context: A252476 A020397 A132410 * A251773 A116174 A223194

Adjacent sequences:  A252425 A252426 A252427 * A252429 A252430 A252431

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 17 2014

STATUS

approved

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Last modified June 26 00:10 EDT 2019. Contains 324367 sequences. (Running on oeis4.)