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A351623
Numbers k where 3k sets a record for the number of divisors of multiples of 3.
1
1, 2, 4, 8, 12, 16, 20, 40, 60, 80, 120, 240, 280, 420, 560, 840, 1680, 2520, 3360, 5040, 6720, 8400, 9240, 15120, 16800, 18480, 27720, 36960, 55440, 73920, 92400, 110880, 166320, 184800, 221760, 240240, 360360, 480480, 720720, 960960, 1201200, 1441440, 2162160, 2402400
OFFSET
1,2
COMMENTS
This sequence may be useful for understanding A352797.
FORMULA
For n > 1, a(n) = A002182(n+2)/3.
EXAMPLE
6 is not in the sequence because 3*6=18 and 3*4=12 each have 6 divisors.
8 is in the sequence because 3*8=24 sets a record for the number of divisors of multiples of 3.
PROG
(PARI) lista(nn) = {my(m=0, nm); for (n=1, nn, if ((nm=numdiv(3*n)) > m, m = nm; print1(n, ", ")); ); } \\ Michel Marcus, May 04 2022
CROSSREFS
Sequence in context: A118030 A187208 A349725 * A256409 A256403 A308013
KEYWORD
nonn
AUTHOR
J. Lowell, May 04 2022
EXTENSIONS
More terms from Michel Marcus, May 04 2022
STATUS
approved