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A280342
Sum of digits of A003418(n).
1
1, 1, 2, 6, 3, 6, 6, 6, 12, 9, 9, 18, 18, 18, 18, 18, 18, 18, 18, 36, 36, 36, 36, 45, 45, 36, 36, 27, 27, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 72, 72, 81, 81, 81, 81, 72, 72, 90, 90, 90, 90, 99, 99, 99, 99, 99, 99, 99, 99, 90, 90, 90, 99, 99, 99, 117, 117, 117
OFFSET
0,3
COMMENTS
For n>2, a(n) mod 3 = 0.
FORMULA
a(n) = A007953(A003418(n)). - Michel Marcus, Jan 01 2017
EXAMPLE
For n=10, A003418(10) = 2520. So, the sum of digits of 2520 is 2+5+2+0 = 9. a(10)=9.
PROG
(PARI) a(n) = sumdigits(lcm(vector(n, i, i))); \\ Michel Marcus, Jan 01 2017
CROSSREFS
Sequence in context: A083481 A177209 A274439 * A275476 A185380 A373058
KEYWORD
nonn,base
AUTHOR
Indranil Ghosh, Jan 01 2017
STATUS
approved