A263219 Number of (n+1)X(3+1) 0..2 arrays with each row and column divisible by 5, read as a base-3 number with top and left being the most significant digits.

4, 72, 1009, 12601, 198892, 3345984, 56362801, 951167305, 16140651460, 274301213400, 4662032059249, 79241699410777, 1347050532750556, 22899642182348976, 389291621638482865, 6617932860469046761

Offset

1,1

Comments

Column 3 of A263224.

Links

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

Formula

Empirical: a(n) = 24*a(n-1) -119*a(n-2) +2261*a(n-4) -54264*a(n-5) +269059*a(n-6) -1067290*a(n-8) +25614960*a(n-9) -127007510*a(n-10) +160126570*a(n-12) -3843037680*a(n-13) +19055061830*a(n-14) -8388238565*a(n-16) +201317725560*a(n-17) -998200389235*a(n-18) +103391555281*a(n-20) -2481397326744*a(n-21) +12303595078439*a(n-22) -95162378256*a(n-24) +2283897078144*a(n-25) -11324323012464*a(n-26)

Example

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

Crossrefs

Cf. A263224.

Sequence in context: A139745 A066992 A165212 * A358295 A100521 A111868

Adjacent sequences: A263216 A263217 A263218 * A263220 A263221 A263222

Keyword

nonn

Author

R. H. Hardin, Oct 12 2015

Status

approved