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A263956 Number of (1+2)X(n+2) arrays of permutations of 0..n*3+5 filled by rows with each element moved 0 or 1 knight moves, and rows and columns in increasing lexicographic order. 1
6, 40, 118, 354, 1209, 4334, 14525, 46022, 141006, 427611, 1270118, 3707059, 10650367, 30235396, 84926968, 236340047, 652236286, 1787173735, 4866827711, 13182285189, 35538045627, 95417738007, 255294004187, 680978483881 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 1 of A263955.

LINKS

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

R. H. Hardin, Empirical recurrence of order 79

FORMULA

Empirical recurrence of order 79 (see link above)

EXAMPLE

Some solutions for n=4

..0..1..2..7.15.16....0..1.13.14.15.16....0..1..2..3..8.16....0..1..2..3.15.16

..6..3..8.17.14.11....2..7..4..5.10..3....6..7..4.17.14.11....6..7..8..9.14.11

.12.13.10..4..5..9...12..9..6.11..8.17...12.13.10.15..5..9...12.13.10..4..5.17

CROSSREFS

Cf. A263955.

Sequence in context: A114079 A211065 A002595 * A229638 A210291 A089207

Adjacent sequences:  A263953 A263954 A263955 * A263957 A263958 A263959

KEYWORD

nonn

AUTHOR

R. H. Hardin, Oct 30 2015

STATUS

approved

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Last modified February 25 21:00 EST 2020. Contains 332258 sequences. (Running on oeis4.)