A233647 Number of (n+1)X(2+1) 0..5 arrays with every 2X2 subblock having the sum of the squares of the edge differences equal to 14

772, 5232, 36784, 272564, 2012472, 15071680, 112180004, 840367588, 6267926076, 46922305260, 350281544876, 2620797101560, 19574181255752, 146400460065172, 1093757260135120, 8178623368338420, 61113653767807332, 456914521395216488

Offset

1,1

Comments

Column 2 of A233653

Links

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

Formula

Empirical: a(n) = 13*a(n-1) +60*a(n-2) -1403*a(n-3) +915*a(n-4) +60037*a(n-5) -161542*a(n-6) -1305952*a(n-7) +5581957*a(n-8) +14886303*a(n-9) -99457303*a(n-10) -65691409*a(n-11) +1070532941*a(n-12) -439804539*a(n-13) -7350827624*a(n-14) +8431876793*a(n-15) +32422650909*a(n-16) -59093935245*a(n-17) -87614113660*a(n-18) +242031773814*a(n-19) +116489014001*a(n-20) -628983746855*a(n-21) +50730140495*a(n-22) +1046367995789*a(n-23) -482503791934*a(n-24) -1075303683128*a(n-25) +846072582698*a(n-26) +610370785910*a(n-27) -745472433880*a(n-28) -117896421864*a(n-29) +344109162632*a(n-30) -46130175152*a(n-31) -71419513632*a(n-32) +22452177920*a(n-33) +3530443776*a(n-34) -1777822976*a(n-35) +30745088*a(n-36) +22653952*a(n-37) -933888*a(n-38)

Example

Some solutions for n=3
..1..4..1....4..1..4....5..2..0....4..2..2....0..3..1....0..3..4....3..2..3
..1..3..3....3..1..2....3..3..0....4..1..4....1..3..4....1..1..4....3..0..3
..0..0..2....4..1..4....5..2..0....3..3..3....0..3..1....4..3..4....3..1..3
..1..3..3....2..2..2....3..3..3....2..0..1....2..3..4....1..3..1....4..4..4

Crossrefs

Sequence in context: A252559 A259696 A114543 * A285755 A264255 A240843

Adjacent sequences: A233644 A233645 A233646 * A233648 A233649 A233650

Keyword

nonn

Author

R. H. Hardin, Dec 14 2013

Status

approved