1,1

G. Bannay, LE COMPTE EST BON

Index entries for similar sequences

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

Cf. A060315.

Sequence in context: A065850 A106886 A007700 this_sequence A128231 A121981 A088148

Adjacent sequences: A071310 A071311 A071312 this_sequence A071314 A071315 A071316

hard,more,nonn

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