A048183 Least inverse of A048182.

2, 3, 4, 5, 7, 10, 11, 17, 22, 29, 41, 58, 67, 101, 131, 173, 259, 346, 461, 617, 787, 1037, 1571, 2074, 2767, 3703, 5357, 7403, 9427, 12443, 16663, 22217, 33323, 44437, 63677, 88843, 113117, 149323, 219803, 298597, 399883, 533237, 771403, 1018483

Offset: 0

Author

David W. Wilson

Keywords

• nonn

Comments

Also a(n) is the smallest integer that cannot be obtained by using the number 1 at most n+1 times and the operators +, -, *, /. - Koksal Karakus (karakusk(AT)hotmail.com), May 27 2002

Examples

			a(4)=7 because by using the number 1 at most five times we can write 1=1, 1+1=2, 1+1+1=3, 1+1+1+1+1=5, (1+1)*(1+1+1)=6 but we cannot obtain 7 in the same way.
		

Links

• Juris Cernenoks, Janis Iraids, Martins Opmanis, Rihards Opmanis, and Karlis Podnieks, Integer Complexity: Experimental and Analytical Results II, arxiv:1409.0446 [math.NT], 2014; see Table 2.
• Index entries for similar sequences

Crossrefs

Cf. A005520, A060315, A181898.