A038027 Least k such that A038025(k)=n-th composite number or 0 if none.

5, 184613, 67, 10, 11, 13, 127, 77, 33, 191, 187, 22, 23, 25, 26, 1337, 28, 3909, 504511, 37, 43, 57, 36, 4331, 39, 83, 441

Offset: 1

Author

Christian G. Bower with large values calculated by Fred W. Helenius (fredh(AT)ix.netcom.com)

Keywords

• nonn
• hard

Comments

If there is a k : A038025(k)=42 it is > 6670000.