David Callan, Knut Dale, Ivar Skau, John Henry Steelman, Jany C. Binz, Robin J. Chapman, F. Herzig, André Kündgen, Reiner Martin, José Heber Nieto, O. A. Saleh, S. Byrd, Edward F. Schmeichel, Isaac Sofair, Michael Vowe. An Identity Involving Derangements: 10643. The American Mathematical Monthly, 107(3):278-279, 2000. [doi]
Abstract is missing.