Вы можете использовать:
=ArrayFormula(SEQUENCE(1,10,1,5)&"-"&SEQUENCE(1,10,5,5))
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Или, может быть:
=ArrayFormula(SEQUENCE(10,1,1,5)&"-"&SEQUENCE(10,1,5,5))
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Вы даже можете попробовать:
=ArrayFormula(SEQUENCE(10,5,1,5)&"-"&SEQUENCE(10,5,5,5))
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Подробнее о SEQUENCE