A264109 Number of (n+1)X(6+1) arrays of permutations of 0..n*7+6 with each element having index change +-(.,.) 0,0 0,2 or 1,1.

1936, 167464, 15437041, 1399892079, 127528266321, 11613782698504, 1057423575802500, 96278613956842527, 8766291363504861316, 798181501446239189664, 72675347993710995638169, 6617174682296494732387825

Offset

1,1

Comments

Column 6 of A264110.

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)

Example

Some solutions for n=2
..0..3..4..1..2..5..6....0..9.10..3..4.13..6....0..3.10.11..6..5..4
.15..8..9.10.11.12.13...15..8..1..2.11.20..5....9..8..1..2.19.12.13
.14..7.16.19.20.17.18...14..7.18.17.16.19.12...14..7.18.15.16.17.20

Crossrefs

Cf. A264110.

Sequence in context: A270265 A237010 A256765 * A188369 A185570 A367679

Adjacent sequences: A264106 A264107 A264108 * A264110 A264111 A264112

Keyword

nonn

Author

R. H. Hardin, Nov 03 2015

Status

approved