A363280 Products of primorials that are not highly composite.

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

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