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A174985
Start with n, iterate the map k -> A167507(k) until we reach 3, 4, 5 or 6; a(n) = number of steps required.
2
2, 3, 2, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 3, 2, 2, 3, 3, 3, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 4, 3, 3, 3, 3, 3, 3, 3, 3, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 4, 3, 3, 3, 3, 3, 3, 4, 3, 4, 3, 4, 3, 3, 3, 3, 3, 3, 3, 3, 4, 3, 4, 3, 3, 3, 4, 3, 3, 4, 4, 4, 3, 4, 4, 4
OFFSET
1,1
CROSSREFS
KEYWORD
nonn,word
AUTHOR
Jacques ALARDET, Apr 03 2010
EXTENSIONS
Edited by N. J. A. Sloane, Apr 05 2010
STATUS
approved