A178053 Digital roots of mountain numbers (cf. A134941).

1, 4, 5, 6, 7, 8, 9, 1, 2, 7, 8, 9, 1, 2, 3, 4, 7, 9, 1, 2, 3, 4, 5, 8, 9, 2, 3, 4, 5, 6, 9, 1, 2, 4, 5, 6, 7, 1, 2, 3, 4, 6, 7, 8, 2, 3, 4, 5, 6, 8, 9, 3, 4, 5, 6, 7, 8, 1, 4, 5, 6, 7, 8, 9, 1, 9, 2, 3, 4, 5, 6, 7, 1, 2, 4, 5, 6, 7, 8, 2, 3, 4, 6, 7, 8, 9, 3, 4, 5, 6, 8, 9, 1, 4, 5, 6, 7, 8, 1, 2, 5, 6, 7, 8, 9

Offset: 1

Author

Reinhard Zumkeller, May 25 2010

Keywords

• base
• fini
• full
• nonn

Comments

a(n) = A010888(A134941(n)).

Examples

			A134941(552)=134941 --> 1+3+4+9+4+1=22 --> a(552)=2+2=4.
		

Links

• R. Zumkeller, Table of n, a(n) for n = 1..21846 (full sequence)

Crossrefs

Cf. A178052.