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A033909 Number of Sort then Add steps needed to reach a sorted number, or -1 if never reach sorted number. 2
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 1, 1, 1, 1, 3, 2, 0, 0, 0, 0, 1, 1, 1, 3, 2, 2, 2, 0, 0, 0 (list; graph; refs; listen; history; internal format)
OFFSET

0,65

EXAMPLE

64 -> 64+46=110 -> 110+11=121 -> 121+112 = 233, taking 3 steps to reach a sorted number, so a(64)=3.

CROSSREFS

Cf. A033863, A033908.

Sequence in context: A068542 A036112 A134884 * A206590 A206825 A133949

Adjacent sequences:  A033906 A033907 A033908 * A033910 A033911 A033912

KEYWORD

nonn,base

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

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Last modified February 17 11:46 EST 2012. Contains 206011 sequences.