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A223978 Number of 5Xn 0..2 arrays with rows and antidiagonals unimodal 1
243, 59049, 3628696, 84988435, 1140963027, 10676374380, 76942621022, 453969579904, 2284206888340, 10088688214569, 39954771229458, 144202872415543, 480339235745630, 1491693619175208, 4354474074592966 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 5 of A223975

LINKS

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

FORMULA

Empirical: a(n) = (63370093/405483668029440000)*n^20 + (71859847/9357315416064000)*n^19 + (3840596671/12804747411456000)*n^18 + (16093136419/2134124568576000)*n^17 + (89468187533/627683696640000)*n^16 + (124873595783/62768369664000)*n^15 + (2671089252541/125536739328000)*n^14 + (32125296547501/188305108992000)*n^13 + (302581775150461/289700167680000)*n^12 + (44545336450771/9656672256000)*n^11 + (289473882894181/19313344512000)*n^10 + (311624791382747/9656672256000)*n^9 + (1803023416115741/34871316480000)*n^8 + (43416115518617/724250419200)*n^7 + (2936371270324637/47076277248000)*n^6 - (1561630187307499/2615348736000)*n^5 - (2687139777308839/111152321280000)*n^4 - (285271644066077/77189112000)*n^3 + (4647951175288301/586637251200)*n^2 - (79120764337/15519504)*n + 1710 for n>2

EXAMPLE

Some solutions for n=3

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

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

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

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

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

CROSSREFS

Sequence in context: A228975 A016949 A223792 * A223573 A223329 A216328

Adjacent sequences:  A223975 A223976 A223977 * A223979 A223980 A223981

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 30 2013

STATUS

approved

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Last modified December 4 15:36 EST 2021. Contains 349526 sequences. (Running on oeis4.)