A364583 - OEIS

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A364583

a(n) is the least number with exactly n divisors of the form 3*k+2.

1, 2, 8, 20, 40, 80, 140, 320, 280, 800, 560, 5120, 1120, 6400, 2240, 3920, 3080, 40000, 5600, 102400, 6160, 15680, 35840, 20971520, 12320, 110000, 44800, 39200, 24640, 1342177280, 30800, 193600, 40040, 250880, 280000, 440000, 61600, 1210000, 716800, 313600, 80080, 5497558138880

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

OFFSET

0,2

LINKS

Jinyuan Wang, Table of n, a(n) for n = 0..1000

FORMULA

a(n) <= 5*2^(n-1). - David A. Corneth, Jul 29 2023

PROG

(PARI) a(n) = my(k=1); while (sumdiv(k, d, (d%3)==2) != n, k++); k; \\ Michel Marcus, Jul 29 2023

CROSSREFS

Cf. A001822, A005179, A038547, A364582.

Sequence in context: A128445 A007290 A049031 * A058037 A203420 A048096