A077667 - OEIS

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A077667

Triangle read by rows. Let k = n-th composite number. The n-th row gives k smallest numbers unrelated to k (numbers which do not divide k, are not divisible by k and are not coprime to k).

6, 10, 14, 18, 4, 8, 9, 10, 14, 15, 6, 10, 12, 14, 18, 20, 22, 26, 6, 12, 15, 21, 24, 30, 33, 39, 42, 4, 6, 8, 12, 14, 15, 16, 18, 22, 24, 8, 9, 10, 14, 15, 16, 18, 20, 21, 22, 26, 27, 4, 6, 8, 10, 12, 16, 18, 20, 21, 22, 24, 26, 30, 32, 6, 9, 10, 12, 18, 20, 21, 24, 25, 27, 33

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

OFFSET

1,1

COMMENTS

Primes do not have unrelated numbers.

LINKS

Table of n, a(n) for n=1..74.

EXAMPLE

The first few rows are:

6, 10, 14, 18;

4, 8, 9, 10, 14, 15;

6, 10, 12, 14, 18, 20, 22, 26;