0,2

A. Erdelyi, Higher Transcendental Functions, McGraw-Hill, 1955, Vol. 3, p. 11.

F. Klein, Lectures on the Icosahedron ..., 2nd Rev. Ed., 1913; reprinted by Dover, NY, 1956; see p. 61.

S. Mukai, An Introduction to Invariants and Moduli, Cambridge, 2003; see p. 19.

H = - (x^20+y^20) + 228*(x^15*y^5-x^5*y^15) - 494*x^10*y^10.

Cf. A128809. The third invariant (which does not have its own entry) is f = x*y*(x^10+11*x^5*y^5-y^10).

Sequence in context: A098245 A090943 A154519 this_sequence A043411 A053174 A103837

Adjacent sequences: A128805 A128806 A128807 this_sequence A128809 A128810 A128811

sign,fini,full

N. J. A. Sloane (njas(AT)research.att.com), Apr 10 2007