1,2
It is not difficult to show that these numbers have the form a(n) =3^i*4^j with j <= i <= 2j.
Every term is also a term of A064476.
Sequence in context: A058880 A055551 A073403 this_sequence A135178 A085331 A058040
Adjacent sequences: A064515 A064516 A064517 this_sequence A064519 A064520 A064521
nonn
Vladeta Jovovic (vladeta(AT)Eunet.yu), Oct 07 2001
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