A217337 Numbers n that are the signed sum of powers of 2 whose exponents concatenated form n itself.

14, 492, 1052, 1056, 2116, 16314, 261818, 262184, 1047920, 1048207

Offset

1,1

Links

Table of n, a(n) for n=1..10.

Example

14 = -2^1 + 2^4, 492 = -2^4 + 2^9 - 2^2, 1052 = 2^10 + 2^5 - 2^2, 1056 = 2^10 - 2^5 + 2^6, 2116 = 2^2 + 2^11 + 2^6, etc.
1048207 is in the sequence since 1048207 = -2^1 + 2^0 + 2^4 - 2^8 + 2^20 - 2^7 and the exponents are 1, 0, 4, 8, 20, 7.

Crossrefs

Sequence in context: A317635 A128051 A396532 * A251867 A240411 A024299

Adjacent sequences: A217334 A217335 A217336 * A217338 A217339 A217340

Keyword

nonn,base

Author

Giovanni Resta, Oct 01 2012

Status

approved