Which composite number is n! ?: a(n) = k such that A002808(k) = n!, or 0 if n! is not composite.

A065892

Which composite number is n! ?: a(n) = k such that A002808(k) = n!, or 0 if n! is not composite.

Terms

    a(0) =0a(1) =0a(2) =2a(3) =14a(4) =89a(5) =591a(6) =4364a(7) =36088a(8) =331910a(9) =3370110a(10) =37487843a(11) =453695312a(12) =5937400048a(13) =83567800394

External references