Multifactorial

func mfact(s, n) {
    n > 0 ? (n * mfact(s, n-s)) : 1
}

{ |s|
    say "step=#{s}: #{{|n| mfact(s, n)}.map(1..10).join(' ')}"
} << 1..10

Output:

step=1: 1 2 6 24 120 720 5040 40320 362880 3628800
step=2: 1 2 3 8 15 48 105 384 945 3840
step=3: 1 2 3 4 10 18 28 80 162 280
step=4: 1 2 3 4 5 12 21 32 45 120
step=5: 1 2 3 4 5 6 14 24 36 50
step=6: 1 2 3 4 5 6 7 16 27 40
step=7: 1 2 3 4 5 6 7 8 18 30
step=8: 1 2 3 4 5 6 7 8 9 20
step=9: 1 2 3 4 5 6 7 8 9 10
step=10: 1 2 3 4 5 6 7 8 9 10