A363280 - OEIS

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A363280

Products of primorials that are not highly composite.

1

8, 16, 30, 32, 64, 72, 96, 128, 144, 192, 210, 216, 256, 288, 384, 420, 432, 480, 512, 576, 768, 864, 900, 960, 1024, 1080, 1152, 1296, 1440, 1536, 1728, 1800, 1920, 2048, 2160, 2304, 2310, 2592, 2880, 3072, 3360, 3456, 3600, 3840, 4096, 4320, 4608, 4620, 5184

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

OFFSET

1,1

COMMENTS

Contains A000079(k), k > 2, and A002110(m), m > 2.

Proper subset of A055932, since A025487 is a proper subset of A055932.

LINKS

Michael De Vlieger, Table of n, a(n) for n = 1..10503 (all terms k <= A002110(13))

FORMULA

This sequence is A025487 \ A002182.

MATHEMATICA

(* Load May 19 2018 function f at A025487, then run the following: *)

s = Union@ Flatten@ f[10];

Reap[For[i = 1; r = 0, i <= Length[s], i++,

If[#2 > r, Set[r, #2], Sow[#1]] & @@ {#, DivisorSigma[0, #]} &@

s[[i]]] ][[-1, 1]]

CROSSREFS

Cf. A000079, A002110, A002182, A025487, A055932.

Sequence in context: A191271 A047925 A332918 * A266086 A018922 A290287

Adjacent sequences: A363277 A363278 A363279 * A363281 A363282 A363283

KEYWORD

nonn

AUTHOR

Michael De Vlieger, Dec 12 2023

STATUS

approved