A239250 Number of nX2 0..4 arrays with no element equal to one plus the sum of elements to its left or one plus the sum of elements above it, modulo 5

13, 142, 1440, 14685, 150265, 1536541, 15708373, 160597823, 1641932577, 16786876051, 171626395117, 1754681817378, 17939597892019, 183411695776421, 1875173019958413, 19171481102053119, 196006279918074880

Offset

1,1

Comments

Column 2 of A239256

Links

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

Formula

Empirical: a(n) = 16*a(n-1) -78*a(n-2) +264*a(n-3) -870*a(n-4) +1596*a(n-5) -52*a(n-6) -7238*a(n-7) +36698*a(n-8) -130198*a(n-9) +247568*a(n-10) -332087*a(n-11) +481080*a(n-12) +81284*a(n-13) -1582141*a(n-14) +1105684*a(n-15) +830880*a(n-16) -102044*a(n-17) -849619*a(n-18) -1884476*a(n-19) +1023696*a(n-20) +3161818*a(n-21) -2161900*a(n-22) -2172976*a(n-23) +3526016*a(n-24) -1687296*a(n-25)

Example

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

Crossrefs

Sequence in context: A045742 A122011 A221103 * A029483 A266806 A015672

Adjacent sequences: A239247 A239248 A239249 * A239251 A239252 A239253

Keyword

nonn

Author

R. H. Hardin, Mar 13 2014

Status

approved