

A071313


a(n) is the smallest number that cannot be obtained from the numbers {1,3,...,2*n1} using each number at most once and the operators +, , *, /.


0




OFFSET

1,1


LINKS

Table of n, a(n) for n=1..9.
G. Bannay, LE COMPTE EST BON
Index entries for similar sequences


EXAMPLE

a(2)=5 because using {1,3} and the four operations we can obtain 1=1, 31=2, 3=3, 3+1=4 but we cannot obtain 5 in the same way.


CROSSREFS

Cf. A060315.
Sequence in context: A106886 A237814 A007700 * A172297 A128231 A088148
Adjacent sequences: A071310 A071311 A071312 * A071314 A071315 A071316


KEYWORD

hard,more,nonn


AUTHOR

Koksal Karakus (karakusk(AT)hotmail.com), Jun 11 2002


STATUS

approved



