

A188649


Least common multiple of reversals of divisors of n in decimal representation.


6



1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 84, 31, 574, 255, 488, 71, 162, 91, 20, 84, 22, 32, 168, 260, 62, 72, 1148, 92, 510, 13, 11224, 33, 6106, 1855, 2268, 73, 15106, 93, 40, 14, 6888, 34, 44, 4590, 64, 74, 10248, 658, 260, 1065, 3100, 35, 3240, 55, 149240, 6825, 7820, 95, 7140, 16, 26, 252, 11224, 8680, 66, 76, 12212, 96, 152110, 17, 4536, 37, 6862, 251940, 2024204, 77
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OFFSET

1,2


COMMENTS

a(A000040(n)) = A004087(n);
a(A002385(n)) = A002385(n), see A188650 for all fixed points.


LINKS

Reinhard Zumkeller, Table of n, a(n) for n = 1..10000
Index entries for sequences related to lcm's


EXAMPLE

Divisors(42) = {1,2,3,6,7,14,21,42}, therefore a(42) = lcm(1,2,3,6,7,41,12,24) = 6888.


PROG

(Haskell)
a188649 n = foldl lcm 1 $ map a004086 $ filter ((== 0) . mod n) [1..n]
(PARI) a(n) = lcm(apply(x>fromdigits(Vecrev(digits(x))), divisors(n))); \\ Michel Marcus, Mar 13 2018


CROSSREFS

Cf. A003990 (LCM), A027750 (divisors), A004086 (reversal).
Sequence in context: A062279 A088599 A004862 * A068634 A049872 A239218
Adjacent sequences: A188646 A188647 A188648 * A188650 A188651 A188652


KEYWORD

nonn,base


AUTHOR

Reinhard Zumkeller, Apr 11 2011


STATUS

approved



