4, 17, 62, 317, ?, 13267
4 `xx` 3 + 5 = 17 17 `xx` 4 – 6 = 62 62 `xx` 5 + 7 = 317 317 `xx` 6 – 8 = 1894 1894 `xx` 7 + 9 = 13267
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