Hexagonal Number/Sequence
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Definition
The sequence of hexagonal numbers, for $n \in \Z_{\ge 0}$, begins:
- $0, 1, 6, 15, 28, 45, 66, 91, 120, 153, 190, 231, \ldots$
This sequence is A000384 in the On-Line Encyclopedia of Integer Sequences (N. J. A. Sloane (Ed.), 2008).
Sources
- 1986: David Wells: Curious and Interesting Numbers ... (previous) ... (next): $45$
- 1986: David Wells: Curious and Interesting Numbers ... (previous) ... (next): Tables: $2$ The First $20$ Pentagonal, Hexagonal, Heptagonal and Octagonal Numbers
- 1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): $45$
- 1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): Tables: $2$ The First $20$ Pentagonal, Hexagonal, Heptagonal and Octagonal Numbers