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A271677 Number of ways to move elements of an nXnXn triangular array to themselves or a neighbor, with no more than 1-1 elements moved to themselves. 0
0, 2, 4, 132, 3440, 358792, 71771952, 39547904272, 51276433391328, 167894702548149600, 1348410361035047416704 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Column 1 of A271684.
LINKS
EXAMPLE
Some solutions for n=4
.....5........6........6........5........5........5........6........6
....5.1......6.1......6.1......2.6......4.1......6.1......2.6......2.3
...5.2.5....2.6.6....5.1.6....5.2.6....6.4.3....5.2.6....5.1.6....5.6.6
..4.2.4.1..2.3.3.1..4.1.2.3..2.2.3.3..2.3.4.3..4.1.2.3..4.1.1.3..2.2.3.1
Element moves: 0=itself 1=nw 2=ne 3=w 4=e 5=sw 6=se, reciprocals total 7
CROSSREFS
Cf. A271684.
Sequence in context: A012614 A018500 A353790 * A226070 A013552 A018512
KEYWORD
nonn
AUTHOR
R. H. Hardin, Apr 12 2016
STATUS
approved

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Last modified March 28 14:38 EDT 2024. Contains 371254 sequences. (Running on oeis4.)