square pyramidal number

pyramidal number

en-GB/ˈskwɛə pɪˈɹæmɪdəl ˈnʌmbə/
en-US/ˈskwɛɹ pɪˈɹæmɪdəl ˈnʌmbɚ/

الفئات:

figurate numberpyramidal number