A pair of simple bivariate inverse series relations are used by embedding machinery to produce several double summation formulae on shifted factorials (or binomial coefficients), including the evaluation due to Blodgett-Gessel. Their q-analogues are established in the second section. Some generalized convolutions are presented through formal power series manipulation.
@article{urn:eudml:doc:40584, title = {Inverse series relations, formal power series and Blodgett-Gessel's type binomial identities.}, journal = {Collectanea Mathematica}, volume = {48}, year = {1997}, pages = {265-279}, zbl = {0906.05003}, mrnumber = {MR1475802}, language = {en}, url = {http://dml.mathdoc.fr/item/urn:eudml:doc:40584} }
Wenchang, Chu. Inverse series relations, formal power series and Blodgett-Gessel's type binomial identities.. Collectanea Mathematica, Tome 48 (1997) pp. 265-279. http://gdmltest.u-ga.fr/item/urn:eudml:doc:40584/