A121871 Triangle read by rows: see DeTemple et al. reference for definition.

1, 2, -2, 11, -12, 2, 52, -70, 20, -2, 269, -392, 150, -28, 2, 1414, -2186, 1000, -262, 36, -2

Offset

1,2

Links

Table of n, a(n) for n=1..21.

D. DeTemple and M. Hudelson, Square-banded polygons and affine regularity, Amer. Math. Monthly, 108 (No. 2, 2001), 100-114.

Example

Triangle begins:
1
2 -2
11 -12 2
52 -70 20 -2
269 -392 150 -28 2

Crossrefs

Leading diagonal is A026933.

Sequence in context: A309477 A126806 A279197 * A194638 A327870 A235606

Adjacent sequences: A121868 A121869 A121870 * A121872 A121873 A121874

Keyword

sign,tabl,more

Author

N. J. A. Sloane, Sep 05 2006

Status

approved