Journal of Integer Sequences, Vol. 28 (2025), Article 25.6.1

Generalizing Recent Results of Kathiravan, Majumdar, Sangale, and Srinivas on (ℓ, k)-regular Partitions


Manjil P. Saikia
Mathematical and Physical Sciences Division
School of Arts and Sciences
Ahmedabad University
Navrangpura, Ahmedabad, Pin 380009
India

James A. Sellers
Department of Mathematics and Statistics
University of Minnesota Duluth
Duluth, MN 55812
USA

Abstract:

In two recent papers, Kathiravan, Srinivas, and Sangale and Kathiravan, Sangale, and Majumdar proved several congruences satisfied by (ℓ,k)-regular partitions; that is, partitions whose parts are not divisible by integers ℓ or k. In this short note, we generalize some of their results, and prove two infinite family of congruences modulo 2 and one infinite family of congruences modulo 12. Our proofs involve only elementary techniques.


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(Concerned with sequences A000009 A000726 A001935 A035959 A187020 A219601 A273845 A318026 A328547.)


Received August 1 2025; revised versions received August 2 2025; October 17 2025. Published in Journal of Integer Sequences, October 19 2025.


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