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A264586
Number of (3+1)X(n+1) arrays of permutations of 0..n*4+3 with each element having directed index change 1,0 0,-1 1,2 or -1,1.
1
0, 4, 4, 28, 97, 333, 1380, 4497, 16712, 61820, 220148, 817438, 2928108, 10697750, 38920136, 141054653, 514441936, 1866146690, 6788624488, 24686203092, 89672098757, 326220334103, 1185345202297, 4309679482381, 15667708119546
OFFSET
1,2
COMMENTS
Row 3 of A264583.
LINKS
EXAMPLE
Some solutions for n=4
..1..2..3..4..8....1..5..3..4..8....1..2..3..4..8....1..2..3..4..8
..6.10..0..9.13....0.10..2..9.13....0.10.11..9.13....6.10..0.12.13
.11.15..5.14..7...11.15..7..6.18....5.15..7..6.18....5.15..7.17..9
.16.17.18.19.12...16.17.12.19.14...16.17.12.19.14...16.11.18.19.14
CROSSREFS
Cf. A264583.
Sequence in context: A272040 A338672 A065237 * A348635 A307499 A111723
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 18 2015
STATUS
approved