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A201018 Composite numbers whose multiplicative digital root is 5. 2
15, 35, 51, 57, 75, 115, 135, 153, 175, 315, 351, 355, 395, 511, 513, 517, 531, 535, 539, 553, 575, 579, 597, 715, 755, 759, 795, 935, 957, 975, 1115, 1135, 1157, 1175, 1315, 1351, 1355, 1359, 1395, 1513, 1517, 1535, 1539, 1557, 1575, 1593, 1715, 1751, 1755, 1795 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Complement of A201017 with respect to A034052.

LINKS

Table of n, a(n) for n=1..50.

Eric Weisstein's World of Mathematics, Multiplicative Digital Root

EXAMPLE

Composite number 153 is in the sequence because 1*5*3=15, 1*5=5.

CROSSREFS

Cf. A201017 (primes whose multiplicative digital root is 5), A034052 (numbers whose multiplicative digital root is 5).

Sequence in context: A321182 A268463 A108668 * A187400 A162280 A290781

Adjacent sequences:  A201015 A201016 A201017 * A201019 A201020 A201021

KEYWORD

nonn,base

AUTHOR

Jaroslav Krizek, Nov 25 2011

STATUS

approved

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Last modified January 24 10:24 EST 2020. Contains 331193 sequences. (Running on oeis4.)