Eventum investigationis
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- [[Fasciculus:Triangular number 10 as sum of gnomons.svg|thumb|200px|left|Numeri trigonales in [[triangulum|triangulo]]: 1, 1+2=3, 1+2+3=6, 1+2+3+4=10.]] ...Tw9XzBg&sa=X&oi=book_result&ct=result&resnum=6&ved=0CDsQ6AEwBQ#v=onepage&q=numeri%20triangulares&f=false Sämtliche Schriften und Briefe, Band 3 Von Gottfried ...6 chiliocteti (872 verba) - 11:43, 13 Octobris 2022