| 单词 | tetrahedral numbers |
| 释义 | > as lemmastetrahedral numbers 3. Mathematics. tetrahedral numbers, the series of integers 1, 4, 10, 20,…, the nth member of which is the sum of the first n triangular numbers. ΘΚΠ the world > relative properties > number > mathematical number or quantity > numerical arrangement > [noun] > set > sequence > series > infinite secundan1685 infinite series1706 Taylor('s) series1816 Maclaurin's series1881 power series1884 Fibonacci('s) series1891 Laurent's expansion1893 Fibonacci('s) numbers1914 majorant1925 tetrahedral numbers1939 Fibonacci('s) sequence1964 binomial series1966 1939 W. W. R. Ball Math. Recreations & Ess. (ed. 11) ii. 59 The sums of consecutive triangular numbers are the tetrahedral numbers. 1983 Austral. Personal Computer IV. v. 103/1 The Tetrahedral Numbers..represent the number of identical spheres that can be stacked in a complete triangular pyramid, or tetrahedron. < as lemmas |
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