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A233886 Number of (n+1)X(2+1) 0..6 arrays with every 2X2 subblock having the sum of the squares of the edge differences equal to 30, and no two adjacent values equal 1
384, 1960, 9376, 47732, 233468, 1183328, 5829956, 29477912, 145866316, 736514180, 3656220328, 18445344136, 91795812176, 462850707208, 2308053143992, 11633489168304, 58106230865268, 292809287700868, 1464472038952276 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 2 of A233892
LINKS
FORMULA
Empirical: a(n) = 4*a(n-1) +72*a(n-2) -278*a(n-3) -2093*a(n-4) +7846*a(n-5) +31943*a(n-6) -118256*a(n-7) -280293*a(n-8) +1059474*a(n-9) +1464690*a(n-10) -5968574*a(n-11) -4541666*a(n-12) +21819710*a(n-13) +7753185*a(n-14) -52635660*a(n-15) -4645134*a(n-16) +84280382*a(n-17) -7066733*a(n-18) -89291380*a(n-19) +16609381*a(n-20) +61880902*a(n-21) -14399047*a(n-22) -27456604*a(n-23) +6388152*a(n-24) +7484866*a(n-25) -1438992*a(n-26) -1148164*a(n-27) +135572*a(n-28) +79124*a(n-29) -1776*a(n-30) -736*a(n-31) +32*a(n-32)
EXAMPLE
Some solutions for n=4
..1..0..1....0..2..6....1..5..1....4..1..0....5..6..5....2..6..2....0..1..3
..5..2..5....4..1..4....0..3..4....3..5..3....1..4..1....4..3..4....3..5..2
..4..0..4....3..5..6....1..5..1....4..1..4....5..3..5....2..6..2....4..1..3
..1..2..1....0..1..3....3..2..0....6..2..0....1..4..1....1..3..4....3..5..6
..4..0..4....2..5..6....1..5..4....4..1..4....2..6..2....2..6..2....4..1..4
CROSSREFS
Sequence in context: A179664 A212430 A134175 * A256735 A256728 A236029
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 17 2013
STATUS
approved

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Last modified March 4 02:53 EST 2024. Contains 370522 sequences. (Running on oeis4.)