A327282 Cardinalities of the minimal sets of base-n representations of the composite numbers.

3, 4, 9, 10, 19, 18, 26, 28, 32, 32, 46, 43, 52, 54, 60, 60, 95, 77, 87, 90, 94, 97, 137, 117, 111, 115, 131, 123, 207, 147, 160, 163, 201, 169, 216, 173, 185, 195, 242, 205, 331, 229, 242, 252, 277, 261, 411, 294, 292, 290, 322, 299, 438, 331, 304, 331, 356, 339, 659, 375, 379, 404, 461, 412

Offset

2,1

Comments

Second column |M(S_b)| of Figure 4 on page 20 of the Bright, Devillers, Shallit article.

Links

Table of n, a(n) for n=2..65.

Curtis Bright, Raymond Devillers, and Jeffrey Shallit, Minimal Elements for the Prime Numbers, June 11, 2015.

Curtis Bright, Computed data for the MEPN project, data for composites, GitHub, 2015.

Raymond Devillers, Minimal primes and left-right-truncatable primes, GitHub repository, 2021.

Mersenneforum, Generalized minimal (probable) primes, Jan 2021.

Example

a(10) = 32 because there are 32 elements in the minimal set of composite-strings in base 10, given in A071070.

Crossrefs

Cf. A071070, A330048.

Sequence in context: A093513 A047230 A277138 * A126269 A319618 A172980

Adjacent sequences: A327279 A327280 A327281 * A327283 A327284 A327285

Keyword

nonn

Author

Hugo Pfoertner, Nov 29 2019

Extensions

a(31)-a(65) from Hugo Pfoertner using data from Raymond Devillers, Jan 12 2021

Status

approved