editing
approved
editing
approved
Number of (3+1)X(n+1) arrays of permutations of 0..n*k-1 4+3 with each element having index change +-(.,.) 0,0 0,1 or 2,-2.
approved
editing
editing
approved
R. H. Hardin, <a href="/A264092/b264092.txt">Table of n, a(n) for n = 1..210</a>
allocated for R. H. Hardin
Number of (3+1)X(n+1) arrays of permutations of 0..n*k-1 with each element having index change +-(.,.) 0,0 0,1 or 2,-2.
16, 169, 2401, 32761, 456976, 6355441, 88529281, 1232922769, 17172529936, 239180661721, 3331358690401, 46399815451081, 646266084871696, 9001325016847969, 125372284530501121, 1746210653453054881
1,1
Row 3 of A264090.
Empirical: a(n) = 14*a(n-1) +14*a(n-2) -210*a(n-3) +210*a(n-5) -14*a(n-6) -14*a(n-7) +a(n-8)
Some solutions for n=4
..0..1..3..4.12....1..0.10..3.12....1..0.10.11..4....1..0..2..4..3
..6..5..8..7..9....5..7..6..8.17....5..6.15..8..9....6..5..7..9..8
..2.10.11.14.13....2.11..4.13.14....2..3.12.13.14...11.10.12.14.13
.16.15.17.19.18...16.15..9.18.19....7.17.16.19.18...16.15.17.18.19
Cf. A264090.
allocated
nonn
R. H. Hardin, Nov 03 2015
approved
editing
allocated for R. H. Hardin
allocated
approved