New type Stirling like numbers - an email style letter

The notion of the Fibonacci cobweb poset from [1] has been naturally extended to any admissible sequence F in [2] where it was also recognized that the celebrated prefab notion of Bender and Goldman [3] (see also [4,5]) admits such an extension so as to encompass the new type combinatorial objects from [2] as leading examples. Recently the present author had introduced also [6] two natural partial orders in there: one ≤ in grading-natural subsets of cobweb‘s prefabs sets [2] and in the second proposal one endows the set sums of the so called ”prefabiants” with such another partial order that one arrives at Bell-like numbers including Fibonacci triad sequences introduced by the present author in [7]. Here we quote the basic observations concerning the new type Stirling like numbers as they appear in [6]. For more on notation, Stirling like numbers of the first kind and for proofs see [6].