A154878 Numbers whose trajectory under iteration of sum of cubes of digits eventually turns out to be 370

7, 19, 34, 37, 43, 58, 67, 70, 85, 88, 91, 109, 118, 124, 139, 142, 145, 148, 154, 157, 166, 169, 175, 178, 181, 184, 187, 190, 193, 196

Offset

1,1

Comments

All the numbers are of the form 3n+1. The iteration halts at 370 because 370 itself is equal to the sum of its digits cube.

Links

Table of n, a(n) for n=1..30.

Example

Taking 34 as example, 3^3+4^3=91, 9^3+1=730, 7^3+3^3+0^3=370

Crossrefs

Sequence in context: A147465 A053591 A165333 * A124270 A298565 A068678

Adjacent sequences: A154875 A154876 A154877 * A154879 A154880 A154881

Keyword

nonn,base

Author

Avik Roy (avik_3.1416(AT)yahoo.co.in), Jan 16 2009

Status

approved