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Revista de la
Unión Matemática Argentina
On the restricted partition function via determinants with Bernoulli polynomials. II
Mircea Cimpoeaş
Volume 61, no. 2 (2020), pp. 431–440    

https://doi.org/10.33044/revuma.v61n2a15

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Abstract

Let r1 be an integer, a=(a1,,ar) a vector of positive integers, and let D1 be a common multiple of a1,,ar. We prove that if D=1 or D is a prime number then the restricted partition function pa(n):= the number of integer solutions (x1,,xr) to rj=1ajxj=n, with x10,,xr0, can be computed by solving a system of linear equations with coefficients that are values of Bernoulli polynomials and Bernoulli–Barnes numbers.