A210938 Triangle T(n,k) read by rows: coefficient [x^(n-k+1)] of the Zwegers polynomial r_(n)(x), 1 <= k <= n.

1, 1, 19, 1, 43, 187, 1, 67, 943, 1292, 1, 91, 2275, 14104, 7106, 1, 115, 4183, 52260, 162196, 33231, 1, 139, 6667, 129584, 914550, 1531961, 137394, 1, 163, 9727, 259900, 3045224, 13015219, 12389380, 515185

Offset

1,3

Links

Table of n, a(n) for n=1..36.

S. Zwegers, The Folsom-Ono Grid Contains Only Integers, Proceedings of the AMS, Volume 137, Number 5, May 2009, Pages 1579-1584; preprint.

Example

For n = 4 we have r_-4(x) = x^4 + 67*x^3 + 943*x^2 + 1292*x, so its coefficients are [1, 67, 943, 1292], row 4 of the triangle.
Triangle begins:
1;
1,  19;
1,  43,  187;
1,  67,  943,   1292;
1,  91, 2275,  14104,    7106;
1, 115, 4183,  52260,  162196,    33231;
1, 139, 6667, 129584,  914550,  1531961,   137394;
1, 163, 9727, 259900, 3045224, 13015219, 12389380, 515185;

Crossrefs

Sequence in context: A040378 A248124 A040379 * A223521 A018939 A262028

Adjacent sequences: A210935 A210936 A210937 * A210939 A210940 A210941

Keyword

nonn,tabl,more

Author

Omar E. Pol, Jul 12 2012

Status

approved