A384185 - OEIS

A384185

Integers in A375491 in order of their first appearance.

1, 2, 4, 6, 12, 5, 8, 24, 3, 7, 18, 16, 30, 36, 48, 10, 32, 14, 72, 9, 60, 96, 120, 19, 64, 13, 40, 144, 21, 35, 56, 38, 28, 90, 26, 240, 15, 192, 384, 44, 76, 360, 88, 80, 180, 168, 114, 54, 288, 112, 264, 25, 41, 33, 256, 98, 20, 55, 312, 128

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OFFSET

1,2

COMMENTS

Does every positive integer appear in this sequence?

LINKS

Table of n, a(n) for n=1..60.

EXAMPLE

a(1)=1 since the first squarefree integer (1) has 1 group of that order.

a(2)=2 since the first squarefree integer not to have a(1)=1 group of its order (6) has 2 groups of its order.

a(3)=4 since the first squarefree integer not to have a(1)=1 or a(2)=2 groups of its order (30) has 4 groups of its order.

CROSSREFS

Cf. A375491.

Sequence in context: A056763 A190071 A189498 * A129567 A064469 A057700

Adjacent sequences: A384182 A384183 A384184 * A384186 A384187 A384188

KEYWORD

nonn

AUTHOR

Robin Jones, May 21 2025

STATUS

approved