[seqfan] Re: don't understand nonprime modulo count in A093183

[Peter Munn]

On Wed, August 29, 2018 11:45 am, Richard J. Mathar wrote:
> By which mix of prime sieves and sieves of integers modulo 4
> is Haga's A093183 generated?

I'll have a go:

I have listed below the odd nonprimes below 100: those congruent to 1 mod
4 in the left column, those congruent to 3 mod 4 in the right. There are 3
runs consisting of exactly one entry in the left column (33, 57 and 93),
matching A093183(2); and 4 in the right column, matching A093184(2).

Best Regards,

Peter

1
9
___15
21
25
___27
33
___35
___39
45
49
___51
___55
57
___63
65
69
___75
77
81
85
___87
___91
93
___95
___99