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2^i * 3^j is a term iff 3*i + 2*j is 3-smooth, see A067371.
Table of n, a(n) for n=1..41.
144 = 2^4 * 3^2: A003415(144) = 384 = 2^7 * 3, therefore 144 is a term.
Sequence in context: A032883 A023786 A018231 * A127483 A130804 A022999
Adjacent sequences: A085253 A085254 A085255 * A085257 A085258 A085259
Reinhard Zumkeller, Aug 11 2003