

A218451


10^n minus its binary weight.


0



0, 8, 97, 994, 9995, 99994, 999993, 9999992, 99999988, 999999987, 9999999989, 99999999985, 999999999987, 9999999999986, 99999999999983, 999999999999980, 9999999999999980, 99999999999999980
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OFFSET

0,2


LINKS

Table of n, a(n) for n=0..17.


FORMULA

a(n) = 10^n  A000120(10^n).
a(n) = 10^n  A118738(n).


EXAMPLE

a(2) = 97 because 10^2 = 100, which is 1100100 in binary, having 3 on bits, and 100  3 = 97.
a(3) = 994 because 10^3 = 1000, which is 1111101000 in binary, having 6 on bits, and 1000  6 = 994.


MATHEMATICA

Table[10^n  DigitCount[10^n, 2, 1], {n, 0, 19}]


PROG

(PARI) a(n)=10^nhammingweight(5^n) \\ Charles R Greathouse IV, Oct 28 2012


CROSSREFS

Cf. A011371, A118738.
Sequence in context: A002506 A318012 A320398 * A262777 A292747 A083182
Adjacent sequences: A218448 A218449 A218450 * A218452 A218453 A218454


KEYWORD

nonn,easy,base


AUTHOR

Alonso del Arte, Oct 28 2012, based on examples for A011371 from Hieronymus Fischer, Jun 06 2012.


STATUS

approved



