2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/36208We present the results of the computation of a twisting type N solution to vacuum Einstein equations following an iterative approach. Our results show that the higher order terms fail to provide a full exact solution with non-vanishing twist. Nevertheless, our fourth-order solution still represents a regular and twisting type N solution.9 pages, Tex file; corrected typos, some rephrasing and added referenceGeneral Relativity and Quantum Cosmologytext