Definition:Hexamorphic Number
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Definition
A hexamorphic number is a hexagonal number $H_n$ whose decimal representation ends in $n$.
Sequence of Hexamorphic Numbers
The sequence of hexamorphic numbers, for $n \in \Z_{\ge 0}$, begins:
| \(\ds H_1\) | \(=\) | \(\ds 1\) | ||||||||||||
| \(\ds H_5\) | \(=\) | \(\ds 45\) | ||||||||||||
| \(\ds H_6\) | \(=\) | \(\ds 66\) | ||||||||||||
| \(\ds H_{25}\) | \(=\) | \(\ds 1225\) | ||||||||||||
| \(\ds H_{26}\) | \(=\) | \(\ds 1326\) | ||||||||||||
| \(\ds H_{50}\) | \(=\) | \(\ds 4950\) |
Sources
- 1991: Clifford A. Pickover: Computers and the Imagination
- 1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): $45$