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

0,3

COMMENTS

For n>2, a(n) mod 3 = 0.

LINKS

Indranil Ghosh, Table of n, a(n) for n = 0..10000

Indranil Ghosh, Python Program to generate the sequence.

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

Cf. A003418, A007953.

Sequence in context: A083481 A177209 A274439 * A275476 A185380 A136695

Adjacent sequences:  A280339 A280340 A280341 * A280343 A280344 A280345

KEYWORD

nonn,base

AUTHOR

Indranil Ghosh, Jan 01 2017

STATUS

approved

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Last modified September 24 11:11 EDT 2020. Contains 337317 sequences. (Running on oeis4.)