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A250323 Number of length 4+2 0..n arrays with the sum of second differences squared multiplied by some arrangement of +-1 equal to zero 0
24, 161, 652, 1773, 3916, 7969, 14452, 24293, 38720, 59201, 86768, 123737, 170864, 231061, 307156, 400573, 512768, 650369, 812560, 1003945, 1228880, 1491229, 1791156, 2138429, 2532856, 2981513, 3489820, 4060069, 4693008 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 4 of A250320

LINKS

Table of n, a(n) for n=1..29.

EXAMPLE

Some solutions for n=6

..2....2....2....1....1....4....1....2....4....2....0....3....3....1....2....2

..0....3....2....3....4....4....2....0....3....5....1....0....4....4....0....4

..1....4....6....4....4....1....2....3....4....6....1....1....4....3....0....5

..3....0....6....4....5....5....0....1....4....4....4....6....5....1....3....3

..2....1....4....3....3....0....0....2....2....3....4....6....1....3....3....2

..2....2....0....1....0....6....1....0....3....0....5....1....2....4....1....4

CROSSREFS

Sequence in context: A305165 A294110 A136380 * A250142 A019583 A244908

Adjacent sequences:  A250320 A250321 A250322 * A250324 A250325 A250326

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 18 2014

STATUS

approved

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Last modified July 25 16:03 EDT 2021. Contains 346291 sequences. (Running on oeis4.)