A264088 Number of (n+1)X(6+1) arrays of permutations of 0..n*7+6 with each element having index change +-(.,.) 0,0 0,1 or 2,-2.

441, 52941, 6355441, 563080476, 49887902736, 4553473226652, 415614152704689, 37837169158128324, 3444664626033715984, 313643056202480964516, 28557777718204425120609, 2600217761364081231601512

Offset

1,1

Comments

Column 6 of A264090.

Links

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

Formula

Empirical: a(n) = 87*a(n-1) +32068*a(n-3) +180766*a(n-4) -3715198*a(n-5) -16639004*a(n-6) +149707392*a(n-7) +542256817*a(n-8) +224301365*a(n-9) +4280490864*a(n-10) -2613943512*a(n-11) +12541107972*a(n-12) -12056948868*a(n-13) +9621158616*a(n-14) -5946708960*a(n-15) -2779571151*a(n-16) +6286349025*a(n-17) -2468635920*a(n-18) -364811148*a(n-19) +148489470*a(n-20) -3874014*a(n-21) +2657124*a(n-22) +16767*a(n-24) +243*a(n-25) for n>27

Example

Some solutions for n=2
..1..0..2..3..4..6..5....1..0..3..2..5..4.18....1..0..2.15..4..6..5
..7..9..8.10.12.11.13....7..8.10..9.12.11.13....7..9..8.10.11.13.12
.14.15.17.16.18.19.20...14.16.15.17..6.19.20...14..3.16.18.17.20.19

Crossrefs

Cf. A264090.

Sequence in context: A220680 A189278 A151656 * A264277 A268874 A264223

Adjacent sequences: A264085 A264086 A264087 * A264089 A264090 A264091

Keyword

nonn

Author

R. H. Hardin, Nov 03 2015

Status

approved