This article considers the eta power . It is proved that the coefficients of in this expression, as polynomials in b, exhibit equidistribution of the coefficients in the nonzero residue classes mod 5 when n = 5j+4. Other symmetries, as well as symmetries for other primes and prime powers, are proved, and some open questions are raised.
@article{bwmeta1.element.bwnjournal-article-doi-10_4064-aa160-4-1, author = {William J. Keith}, title = {Polynomial analogues of Ramanujan congruences for Han's hooklength formula}, journal = {Acta Arithmetica}, volume = {161}, year = {2013}, pages = {303-315}, zbl = {1288.05006}, language = {en}, url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-aa160-4-1} }
William J. Keith. Polynomial analogues of Ramanujan congruences for Han's hooklength formula. Acta Arithmetica, Tome 161 (2013) pp. 303-315. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-aa160-4-1/