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A072440 Number of 3-smooth numbers with decimal digits <= 3. 0
1, 2, 3, 12, 32, 13122 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Possibly the sequence is finite/full (?next term > 10^11).

LINKS

Table of n, a(n) for n=1..6.

EXAMPLE

Digits of 13122 are <= 3 and 13122=2*3^8, therefore 13122 is a term.

CROSSREFS

Cf. A003586.

Sequence in context: A034381 A076424 A165301 * A135522 A107240 A099171

Adjacent sequences:  A072437 A072438 A072439 * A072441 A072442 A072443

KEYWORD

nonn,base,more

AUTHOR

Reinhard Zumkeller, Aug 01 2002

STATUS

approved

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Last modified May 7 17:52 EDT 2021. Contains 343652 sequences. (Running on oeis4.)