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A259773 Product of the digits of the n-th Lucas number. 2
2, 1, 3, 4, 7, 1, 8, 18, 28, 42, 6, 81, 12, 10, 96, 72, 0, 105, 1960, 972, 70, 1344, 0, 0, 0, 1764, 672, 0, 0, 1440, 0, 0, 0, 24192, 0, 0, 34560, 0, 0, 1536, 43008, 0, 0, 0, 0, 0, 0, 41803776, 0, 0, 120960, 3024000, 0, 120960, 0, 0, 0, 6531840, 0, 440899200 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

Probably, the last nonzero term is a(401) = 2^71*3^45*5^9*7^4. - Giovanni Resta, Jul 14 2015

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..1000

FORMULA

a(n) = A007954(A000032(n)). - Michel Marcus, Jul 05 2015

EXAMPLE

9349 is the 19th Lucas number; its digit product is 972, therefore a(19) = 972.

15127 is the 20th Lucas number; its digit product is 70, therefore a(20) = 70.

MATHEMATICA

Table[Times@@IntegerDigits[LucasL[n]], {n, 0, 100}]

PROG

(MAGMA) [&*Intseq(Lucas(n)): n in [0..80]];

CROSSREFS

Cf. A000032, A007954, A139374, A246558.

Sequence in context: A293253 A266687 A060214 * A030133 A139374 A111958

Adjacent sequences:  A259770 A259771 A259772 * A259774 A259775 A259776

KEYWORD

nonn,base

AUTHOR

Vincenzo Librandi, Jul 05 2015

STATUS

approved

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Last modified February 24 11:39 EST 2018. Contains 299603 sequences. (Running on oeis4.)