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A111652
3n appears n times.
2
3, 6, 6, 9, 9, 9, 12, 12, 12, 12, 15, 15, 15, 15, 15, 18, 18, 18, 18, 18, 18, 21, 21, 21, 21, 21, 21, 21, 24, 24, 24, 24, 24, 24, 24, 24, 27, 27, 27, 27, 27, 27, 27, 27, 27, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 36, 36, 36, 36, 36
OFFSET
1,1
MATHEMATICA
Flatten[Table[Table[3n, {n}], {n, 15}]] (* Harvey P. Dale, Jul 23 2013 *)
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Jonathan Vos Post, Aug 12 2005
STATUS
approved