A228327 Start with 0. Successive digits in the sequence must differ by 2. Adjoin the smallest number not yet in the sequence.

0, 2, 4, 6, 8, 64, 20, 24, 68, 642, 42, 46, 86, 420, 202, 424, 242, 464, 246, 468, 646, 864, 686, 868, 6420, 2020, 2024, 2420, 2424, 2464, 2468, 6424, 6464, 6468, 6864, 6868, 64202, 4202, 4242, 4246, 4642, 4646, 4686, 8642, 42020, 20202, 42024, 20242, 42420

Offset

1,2

Comments

Is the sequence infinite?

References

Eric Angelini, Posting to the Sequence Fans Mailing List, Aug 23 2013.

Links

Alois P. Heinz, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A228326, A228328.

Sequence in context: A075401 A083145 A085920 * A081507 A115336 A119666

Adjacent sequences: A228324 A228325 A228326 * A228328 A228329 A228330

Keyword

nonn,base,look

Author

N. J. A. Sloane, Aug 24 2013

Extensions

More terms from Alois P. Heinz, Aug 25 2013

Status

approved