any integer that is the sum of n natural numbers between 1 and n

listen to the pronunciation of any integer that is the sum of n natural numbers between 1 and n
الإنجليزية - الإنجليزية
triangular number

Ten is a triangular number being the sum of 1, 2, 3, and 4.

any integer that is the sum of n natural numbers between 1 and n

    الواصلة

    a·ny in·te·ger that I·s the sum of n na·tu·ral Num·bers be·tween 1 and n

    النطق

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