Answer to dfinke@'s Powershell brain candy tweet.

Get-BrainCandy.ps1

# https://twitter.com/dfinke/status/1167559940598370304
function Get-Exponent {
    param(
        [int]$Base,
        [int]$Power
    )
    $exponent = [Math]::Pow($Base, $Power)
    $exponent
}
function Get-OneSeries {
    # This function outputs an integer with the number of 1 specificed by the inputNumber.
    # E.g. InputNumber = 3, the output is 111
    param (
        [int]$NumberofOne
    )
    $oneSeries = $NumberOfOne- 1
    While ($oneSeries -ge 0) {
        $oneSeriesResult = $oneSeriesResult + (Get-Exponent -Base 10 -Power $oneSeries)
        $oneSeries = $oneSeries - 1
    }
    $oneSeriesResult
}
function Get-CalculatedFirstPart {
    param (
        [ValidateScript( { $_ -ge 1 })]
        [int]$Number
    )
    if ($Number -gt 1) {
        $result = (Get-CalculatedFirstPart -Number ($Number - 1 ))
    }
    $result = $result + (Get-OneSeries -NumberOfOne $Number)
    $result
}
function Get-BrainCandy {
    param (
        [ValidateRange(1, 9)]
        [int]$Layer = 1
    )

    for ($l = 1; $l -le $Layer; $l++) {
        $firstPart = Get-CalculatedFirstPart -Number $l
        $secondPart = $l
        $thirdPart = $firstPart * 8 + $secondPart

        Write-Host ("{0,$Layer} x `e[31m8`e[39m + $secondPart = $thirdPart" -f $firstPart)
    }
}

Get-BrainCandy -layer 9