A343160 - OEIS

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A343160

a(n) is the product of the decimal digits of A343403(n).

2

0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 16, 18, 15, 21, 24, 27, 20, 28, 32, 36, 25, 30, 35, 40, 45, 42, 48, 54, 49, 56, 63, 64, 72, 81, 50, 60, 70, 80, 90, 84, 96, 108, 98, 112, 126, 128, 144, 162, 75, 105, 120, 135, 147, 168, 189, 192, 216, 243, 100, 140

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,3

COMMENTS

Each 7-smooth number (A002473) appears exactly once in the sequence.

LINKS

Rémy Sigrist, Table of n, a(n) for n = 1..10000

Rémy Sigrist, PARI program for A343160

FORMULA

a(n) = A007954(A343403(n)).

EXAMPLE

For n = 42:

- A343403(42) = 259,

- so a(42) = 2*5*9 = 90.

PROG

(PARI) See Links section.

CROSSREFS

Cf. A002473, A007954, A343403.

Sequence in context: A096868 A266351 A206718 * A190760 A067036 A119823

Adjacent sequences: A343157 A343158 A343159 * A343161 A343162 A343163

KEYWORD

nonn,base

AUTHOR

Rémy Sigrist, Apr 14 2021

STATUS

approved