Editing Harshad number (section)

=== First runs of exactly {{mvar|n}} consecutive 10-harshad numbers ===
The smallest naturals starting runs of ''exactly'' {{mvar|n}} consecutive 10-harshad numbers (i.e., the smallest {{mvar|x}} such that <math>x, x+1, \cdots, x+n-1</math> are harshad numbers but <math>x-1</math> and <math>x+n</math> are not) are as follows {{OEIS|id=A060159}}:

<div style="overflow:auto">
{{alternating rows table|class=wikitable|style=text-align: right}}
|-
| {{mvar|n}} || 1 || 2 || 3 || 4 || 5
|-
| {{mvar|x}} || 12 || 20 || 110 || 510 || {{val|131052}}
|-
| {{mvar|n}} || 6 || 7 || 8 || 9 || 10
|-
| {{mvar|x}} || {{val|12751220}}  || {{val|10000095}}  || {{val|2162049150}}  || {{val|124324220}}  || 1
|-
| {{mvar|n}} || 11 || 12 || 13 || 14 || 15
|-
| {{mvar|x}} || {{val|920067411130599}}  || {{val|43494229746440272890}}  || <small>{{val|121003242000074550107423034e20|s=&nbsp;− 10}}</small>  || <small>{{val|420142032871116091607294e40|s=&nbsp;− 4}}</small>  || {{unknown}}
|-
| {{mvar|n}} || 16 || 17 || 18 || 19 || 20
|-
| {{mvar|x}} || <small>{{val|50757686696033684694106416498959861492e280|s=&nbsp;− 9}}</small>  || <small>{{val|14107593985876801556467795907102490773681e280|s=&nbsp;− 10}}</small>  || {{unknown}} || {{unknown}} || {{unknown}}
|-
|}</div>

By the previous section, no such {{mvar|x}} exists for <math>n > 20.</math>