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A258950 Number of (n+3)X(1+3) 0..1 arrays with no 4x4 subblock diagonal sum not equal the antidiagonal sum 1
17920, 80000, 357600, 1645856, 7668960, 35887648, 169347520, 803828768, 3829693280, 18318594784, 87917964800, 423088386624, 2041161306400, 9869739175968, 47819393840000, 232117792647904, 1128649067945600 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 1 of A258957

LINKS

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

FORMULA

Empirical: a(n) = 11*a(n-1) -34*a(n-2) +52*a(n-3) -389*a(n-4) +1200*a(n-5) -487*a(n-6) +3908*a(n-7) -14360*a(n-8) +348*a(n-9) -14088*a(n-10) +73248*a(n-11) +2240*a(n-12) +12872*a(n-13) -133456*a(n-14) -2760*a(n-15) +3568*a(n-16) +39552*a(n-17) +51040*a(n-18) -22336*a(n-19) +896*a(n-20) +5632*a(n-21) -8704*a(n-22) +2048*a(n-23)

EXAMPLE

Some solutions for n=2

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

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

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

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

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

CROSSREFS

Cf. A258957

Sequence in context: A165106 A205661 A258957 * A258949 A205950 A205461

Adjacent sequences:  A258947 A258948 A258949 * A258951 A258952 A258953

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jun 15 2015

STATUS

approved

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Last modified October 2 05:15 EDT 2022. Contains 357191 sequences. (Running on oeis4.)