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A224202 Number of nX6 0..3 arrays with rows unimodal and antidiagonals nondecreasing 1
610, 59792, 2734683, 93052770, 2981774784, 96914926654, 3202561268692, 106630751360602, 3558964686578544, 118857103988506092, 3969834734632962762, 132593577206338949766, 4428640833523450577612, 147916669230853276174408 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A224204

LINKS

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

FORMULA

Empirical: a(n) = 84*a(n-1) -2771*a(n-2) +49004*a(n-3) -526214*a(n-4) +3641009*a(n-5) -16632719*a(n-6) +48536326*a(n-7) -53423733*a(n-8) -313959977*a(n-9) +1729942603*a(n-10) -7086418537*a(n-11) +13780962535*a(n-12) +5231265096*a(n-13) -20279410782*a(n-14) +609579098232*a(n-15) +294855159788*a(n-16) +2331852968592*a(n-17) +7276333185488*a(n-18) +4826951354776*a(n-19) +18771064269632*a(n-20) +25683656373760*a(n-21) +16941876341184*a(n-22) +25615354625280*a(n-23) +22113238049280*a(n-24) +5504163840000*a(n-25) for n>32

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A224062 A224048 A224279 * A232323 A264070 A264022

Adjacent sequences:  A224199 A224200 A224201 * A224203 A224204 A224205

KEYWORD

nonn

AUTHOR

R. H. Hardin Apr 01 2013

STATUS

approved

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Last modified August 17 02:42 EDT 2022. Contains 356180 sequences. (Running on oeis4.)