A305756 Coefficients of (q*(j(q)-720))^(1/24) where j(q) is the elliptic modular invariant.

1, 1, 8192, 707073, -754075135, -132208502783, 90102565204481, 25124693308972545, -11606164284986636798, -4751761734938773786110, 1495856955988144882193922, 890018844816101689979518466, -181104153998957724140261556733

Offset: 0

Author

Seiichi Manyama, Jun 10 2018

Keywords

• sign

Comments

(Conjecture)

Let |b| = 2^p * 3^q * 5^r * ... .

And f(0) = 24, f(b) = 2^(max(0, min(3, p - 1))) * 3^(max(0, min(1, q - 1))) for |b|>0. (See A305762)

Coefficients of (q*(j(q)+b))^(1/f(b)) are integers.

Especially, coefficients of (q*(j(q)+144*k))^(1/24) are integers.

In case of b = -744, |b| = 2^3 * 3^1 * 31 and f(b) = 4. So coefficients of (q*(j(q)-744))^(1/4) are integers. (See A304020)

Links

• Seiichi Manyama, Table of n, a(n) for n = 0..378

Crossrefs

(q*(j(q)+144*k))^(1/24): A106205 (k=0), this sequence (k=-5), A106203 (k=-12).

(q*(j(q)-720))^(m/24): A305760 (m=-24), A305758 (m=-1), this sequence (m=1).

Cf. A000521, A007240 (j(q)-720), A304020, A305757, A305762.