0,3

Conjecture: this sequence is always positive (with n>1).

Table of n, a(n) for n=0..103.

1 is not the sum of Twin lucky number and Twin Even-Lucky-Number, so a(1)=0; 3=1+2 (one way, so a(2)=1); 5=3+2=1+4 (so a(3)=2); etc.

Cf. A000959, A057701, A045954, A045955, A045956.

Sequence in context: A163107 A275840 A178065 * A057747 A281965 A228074

Adjacent sequences: A057745 A057746 A057747 * A057749 A057750 A057751

easy,fini,nonn

Naohiro Nomoto, Oct 30 2000

approved