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User:Aad Thoen
From OeisWiki
Mathematics degree obtained at the University of Leiden, The Netherlands. Has an interest in sudoku and pentominoes and published three books on them, two of them joint with Aad van de Wetering.
Reference for genuiness: https://libris.nl/boek?authortitle=aad-thoen/sudoku-patterns--9789402188349 If needed contact Don Knuth for a confirmation.
