Hexagonal Number/Sequence

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