A217965 Number of 2Xn arrays of the minimum value of corresponding elements and their horizontal or antidiagonal neighbors in a random 0..2 2Xn array

9, 17, 91, 321, 1341, 5269, 21379, 85633, 344955, 1386679, 5579199, 22440525, 90271591, 363117835, 1460674773, 5875648527, 23635221447, 95074256043, 382442764281, 1538402105163, 6188327969265, 24892972759953, 100133687989929

Offset

1,1

Comments

Row 2 of A217964

Links

R. H. Hardin, Table of n, a(n) for n = 1..129

Formula

Empirical: a(n) = 2*a(n-1) +7*a(n-2) +6*a(n-3) -2*a(n-4) -10*a(n-5) -11*a(n-6) -32*a(n-7) -23*a(n-8) -16*a(n-9) +22*a(n-10) +4*a(n-11)

Example

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

Crossrefs

Sequence in context: A197396 A015443 A253212 * A121442 A357567 A049440

Adjacent sequences: A217962 A217963 A217964 * A217966 A217967 A217968

Keyword

nonn

Author

R. H. Hardin Oct 16 2012

Status

approved