A179659 Digital root of the n-th weird number.

7, 8, 7, 7, 1, 1, 2, 8, 4, 1, 1, 7, 8, 5, 2, 7, 5, 1, 2, 7, 1, 4, 5, 1, 2, 8, 4, 1, 2, 8, 5, 2, 7, 4, 5, 1, 8, 7, 8, 4, 5, 4, 1, 8, 4, 5, 2, 4, 1, 7, 8, 5, 7, 8, 1, 8, 4, 2, 7, 4, 5, 2, 4, 5, 1, 2, 5, 7, 8, 1, 2, 8, 2, 7, 7, 4, 2, 8, 5, 1, 7, 5, 2, 8, 4, 1, 7, 8, 4, 7, 5, 1, 2, 5, 8, 5, 1, 4, 5, 2, 4, 2, 4, 2, 4, 1

Offset

1,1

Links

Table of n, a(n) for n=1..106.

Formula

a(n) = A010888(A006037(n)).

Example

The 9th weird number is 10570. 1+0+5+7+0=13, and 1+3=4.

Crossrefs

Cf. A006037

Sequence in context: A255685 A154192 A011283 * A064859 A364896 A233778

Adjacent sequences: A179656 A179657 A179658 * A179660 A179661 A179662

Keyword

nonn,base

Author

Jason G. Wurtzel, Jul 23 2010

Extensions

Extended, keyword:base and formula added - R. J. Mathar, Jul 27 2010

Status

approved