A218518 Number of nX4 arrays of the minimum value of corresponding elements and their horizontal or antidiagonal neighbors in a random 0..3 nX4 array

36, 1348, 46140, 1608968, 55161270, 1884162624, 64278999490, 2192134613268, 74751612059942, 2548947544959236, 86915544096055764, 2963690927218083408, 101057383442299027280, 3445903376402787417912, 117500067196994800465952

Offset

1,1

Comments

Column 4 of A218522

Links

R. H. Hardin, Table of n, a(n) for n = 1..61

Formula

Empirical: a(n) = 42*a(n-1) -245*a(n-2) -717*a(n-3) -5326*a(n-4) +43148*a(n-5) +128181*a(n-6) -176404*a(n-7) -1716466*a(n-8) -2364600*a(n-9) +12012574*a(n-10) +11501431*a(n-11) -58267109*a(n-12) -51447755*a(n-13) +49462902*a(n-14) +161410534*a(n-15) +79479210*a(n-16) -105405324*a(n-17) -153176469*a(n-18) -54313004*a(n-19) +39086790*a(n-20) +45585629*a(n-21) +16699655*a(n-22) +1770396*a(n-23) -935268*a(n-24) -336384*a(n-25) -57600*a(n-26) for n>27

Example

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

Crossrefs

Sequence in context: A203333 A226772 A158739 * A099366 A095657 A209014

Adjacent sequences: A218515 A218516 A218517 * A218519 A218520 A218521

Keyword

nonn

Author

R. H. Hardin Oct 31 2012

Status

approved