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A223739 Number of nX5 0..2 arrays with rows, columns, diagonals and antidiagonals unimodal 1
86, 7396, 237088, 3868968, 41586328, 340038574, 2289596121, 13281578167, 68222609208, 316008418514, 1337293881157, 5222063556941, 18967899632349, 64513878383831, 206644044321249, 626458582331341, 1805406612393872 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A223742

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..136

FORMULA

Empirical: a(n) = (63370093/405483668029440000)*n^20 - (268330757/121645100408832000)*n^19 + (13774799/121949975347200)*n^18 - (2424889373/2134124568576000)*n^17 + (18925169/1107025920000)*n^16 + (11462071/62705664000)*n^15 - (29544684331/5021469573120)*n^14 + (20545808232973/188305108992000)*n^13 - (12540957049199/13795246080000)*n^12 + (41582497189459/9656672256000)*n^11 - (2781361848649/61312204800)*n^10 + (2584592276085773/1379524608000)*n^9 - (6240419528063566523/156920924160000)*n^8 + (23876233435912776007/47076277248000)*n^7 - (1929147516259295957/448345497600)*n^6 + (5962644577920598223/237758976000)*n^5 - (66236190322655654183/661620960000)*n^4 + (14575286592197809/53856000)*n^3 - (12552295491184305071/24443218800)*n^2 + (15114021973648951/19399380)*n - 808791295 for n>11

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A319134 A266823 A262471 * A223722 A223828 A223786

Adjacent sequences:  A223736 A223737 A223738 * A223740 A223741 A223742

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 26 2013

STATUS

approved

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Last modified January 22 21:47 EST 2022. Contains 350504 sequences. (Running on oeis4.)