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A097372 Numbers n such that n=(d_1+6)*(d_2+6)*...*(d_k+6) where d_1 d_2 ... d_k is the decimal expansion of n. 7
90, 840, 4320, 59400, 60480, 917280, 2419200, 34992000, 3714984000, 460522782720, 896168448000, 2194698240000, 39109522636800, 229419122688000, 239446056960000, 650997662515200, 3954407288832000, 182279345504256000, 883270791696384000, 275333274192936960000 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Hiroaki Yamanouchi and Max Alekseyev, Table of n, a(n) for n = 1..29 (contains all terms below 10^100)

EXAMPLE

90 is in the sequence because 90 = (9+6)*(0+6).

MATHEMATICA

Do[h=IntegerDigits[n]; l=Length[h]; If[n==Product[h[[k]]+6, {k, l}], Print[n]], {n, 130000000}]

CROSSREFS

Cf. A097371, A098681, A098682.

Cf. A098113, A098114, A097371, A115227.

Sequence in context: A051695 A304165 A232588 * A263170 A321303 A101243

Adjacent sequences:  A097369 A097370 A097371 * A097373 A097374 A097375

KEYWORD

base,nonn

AUTHOR

Farideh Firoozbakht, Sep 21 2004

EXTENSIONS

More terms from Giovanni Resta, Jan 16 2006

a(19)-a(24) from Hiroaki Yamanouchi, Sep 08 2014

a(25)-a(29) from Max Alekseyev, Jan 25 2015

STATUS

approved

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Last modified June 30 09:10 EDT 2022. Contains 354920 sequences. (Running on oeis4.)