a(1) = 2; for n>1, a(n) is taken to be the smallest integer greater than a(n-1) such that the condition "a(a(n)) is always even" is satisfied.
2, 4, 5, 6, 8, 10, 11, 12, 13, 14, 16, 18, 20, 22, 23, 24, 25, 26, 27, 28, 29, 30, 32, 34
1 seqfan posts
Mon Aug 2 17:40:05 CEST 2010 [seqfan] a(a(n)) is even <==> a(a(n)) is odd