A245171 Triangle read by rows: coefficients of the polynomials A_{2,4}(n,k).

1, 0, 1, 0, 3, 8, 3, 0, 1, 8, 15, 8, 1, 0, 1, 16, 70, 112, 70, 16, 1, 0, 3, 80, 630, 2016, 2940, 2016, 630, 80, 3, 0, 1, 40, 495, 2640, 6930, 9504, 6930, 2640, 495, 40, 1

Offset

0,5

Links

Table of n, a(n) for n=0..42.

J. Agapito, On symmetric polynomials with only real zeros and nonnegative gamma-vectors, Linear Algebra and its Applications, Volume 451, 15 June 2014, Pages 260-289.

Example

Triangle begins:
1,
0,1,
0,3,8,3,
0,1,8,15,8,1,
0,1,16,70,112,70,16,1,
0,3,80,630,2016,2940,2016,630,80,3,
0,1,40,495,2640,6930,9504,6930,2640,495,40,1,
...

Crossrefs

Cf. A245167, A245168, A245169, A245170, A245172, A245173.

Sequence in context: A336054 A341814 A038755 * A011230 A245168 A071209

Adjacent sequences: A245168 A245169 A245170 * A245172 A245173 A245174

Keyword

nonn,tabf,more

Author

N. J. A. Sloane, Jul 13 2014

Status

approved