A069055 Largest n-digit number with only prime divisors 2 or 3 (i.e., of the form 2^a * 3^b).

9, 96, 972, 9216, 98304, 995328, 9565938, 95551488, 967458816, 9795520512, 99179645184, 990677827584, 9895604649984, 96402615118848, 976076478078336, 9882774340543152, 98716277881700352, 999502313552216064

Offset

1,1

Links

Table of n, a(n) for n=1..18.

Mathematica

Table[Max[Select[Flatten[Table[2^a 3^b, {a, 0, Floor[Log2[10^n]]}, {b, Floor[Log[3, 10^n]]}]], #<10^n&]], {n, 20}] (* Harvey P. Dale, Jul 03 2024 *)

Crossrefs

Cf. A069653.

Sequence in context: A005545 A228007 A073560 * A228011 A024116 A264208

Adjacent sequences: A069052 A069053 A069054 * A069056 A069057 A069058

Keyword

nonn,base

Author

Amarnath Murthy, Apr 04 2002

Extensions

More terms from Sascha Kurz, Apr 08 2002

Status

approved