Definition:Hexamorphic Number/Sequence

From ProofWiki
Jump to navigation Jump to search

Definition

The sequence of hexamorphic numbers, for $n \in \Z_{\ge 0}$, begins:

\(\displaystyle H_1\) \(=\) \(\displaystyle 1\)
\(\displaystyle H_5\) \(=\) \(\displaystyle 45\)
\(\displaystyle H_6\) \(=\) \(\displaystyle 66\)
\(\displaystyle H_{25}\) \(=\) \(\displaystyle 1225\)
\(\displaystyle H_{26}\) \(=\) \(\displaystyle 1326\)
\(\displaystyle H_{50}\) \(=\) \(\displaystyle 4950\)

This sequence is A038494 in the On-Line Encyclopedia of Integer Sequences (N. J. A. Sloane (Ed.), 2008).


Sources