0,3

Step=0 -> 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,..

Now any "1" position insert the numbers of Step=0.

Step=1 -> 1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,..

Now any "3" positions insert the numbers of Step=1

Step=2 -> 1,1,2,1,2,3,3,1,4,4,5,2,5,6,6,2,7,7,8,3,8,9,9,3,10,..

Now any "5" positions insert the numbers of Step=2

Step=3 -> 1,1,2,1,2,1,3,3,1,4,4,1,5,2,5,6,6,2,2,7,7,8,3,1,8,9,..

And so on.

Cf. A137161, A137162.

Adjacent sequences: A137160 A137161 A137162 this_sequence A137164 A137165 A137166

Sequence in context: A057112 A071956 A077767 this_sequence A072625 A090329 A027353

easy,nonn

Paolo P. Lava (ppl(AT)spl.at), Jan 28 2008