A331474 Hankel transform of A331473.

1, 3, 2, -50, -43, 535, 487, -4983, -4654, 43174, 40919, -357743, -342287, 2875755, 2769818, -22615130, -21889027, 174913543, 169936759, -1335320799, -1301209414, 10087636558, 9853833647, -75551725535, -73949216543, 561774270675, 550790510642, -4151593378178

Offset: 0

Author

Paul Barry, Jan 17 2020

Keywords

• sign

Crossrefs

Cf. A331473.

Formula

G.f.: (1 + 3x + 16x^2 - 8x^3 + 36x^4 - 12x^5 + x^6 - x^7)/(1 + 7x^2 + x^4)^2 (conjecture).