simpleCountingAlgorithm

{{ $n := (parseArgs 1 "" (carg "int" "int") ).Get 0 }}
{{ if lt $n 0 }} {{ $n = mult $n -1 }} {{ end }}
{{ $x := add $n 3 }}
{{ range $i := seq 0 (add $n 1) }} {{ mult $x (mult -1 $i) }} {{ $x = add $x (mult $i $n) }} {{ end }}
{{- $x }}