Triangular numbers. Stones laid out in a triangle to represent the sequence of numbers formed by the successive addition of consecutive numbers,of which the first term and common difference are 1. Therefore,triangular numbers are 1 (first row),3 (first and second row),6 (first,second and third row),10 (first,second,third and fourth row) and so on | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Hart-Davis, Adam |
Taille de l’image : | 4724 px × 3936 px |
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