
We examine the integersV(n,k)V(n,k)defined by means of\[k!∑n=0∞V(n,k)xn/n!=[x(ex+1)−2(ex−1)]k,k!\sum \limits _{n = 0}^\infty {V(n,k){x^n}/n! = {{[x({e^x} + 1) - 2({e^x} - 1)]}^k},}\]and, in particular, we show how these integers are related to the Bernoulli, Genocchi and van der Pol numbers, and the numbers generated by the reciprocal ofex−x−1{e^x} - x - 1. We prove that theV(n,k)V(n,k)are also related to the numbersW(n,k)W(n,k)defined by\[k!∑n=0∞W(n,k)xn/n!=[(x−2)(ex−1)]kk!\sum \limits _{n = 0}^\infty {W(n,k){x^n}/n! = {{[(x - 2)({e^x} - 1)]}^k}}\]in much the same way the associated Stirling numbers are related to the Stirling numbers. Finally, we examine, more generally, the Bell polynomialsBn,k(a1,a2,3−α,4−α,5−α,…){B_{n,k}}({a_1},{a_2},3 - \alpha ,4 - \alpha ,5 - \alpha , \ldots )and show how the methods of this paper can be used to prove several formulas involving the Bernoulli and Stirling numbers.
van der Pol numbers, exponential partial Bell polynomial, Exact enumeration problems, generating functions, Bell and Stirling numbers, associated Stirling numbers, Bernoulli and Euler numbers and polynomials, Genocchi number, Bernoulli numbers
van der Pol numbers, exponential partial Bell polynomial, Exact enumeration problems, generating functions, Bell and Stirling numbers, associated Stirling numbers, Bernoulli and Euler numbers and polynomials, Genocchi number, Bernoulli numbers
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