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

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

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