A214209 Numbers appearing in A214208 excluding powers 2^i with i>0.

1, 3, 5, 10, 21, 41, 83, 165, 330, 661, 1321, 2642, 5285, 10569, 21139, 42277, 84554, 169109, 338217, 676435, 1352869, 2705738, 5411477, 10822953, 21645906, 43291813, 86583625, 173167251, 346334501, 692669002, 1385338005, 2770676009, 5541352018, 11082704037, 22165408073, 44330816147, 88661632293, 177323264586, 354646529173, 709293058345

Offset: 1

Author

N. J. A. Sloane, Jul 09 2012

Keywords

• nonn

Comments

Created with the hope of obtaining a better understanding of A213975.

Crossrefs

Cf. A213975, A214207, A214208.

Formula

It appears that a(n+1) = 2*a(n) + eps, where eps = 0, 1 or -1. The first 130 values of eps show a pattern which is somewhat mysterious.