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Row 3 of A328464: a(n) = A276156(8n - 4) / 6.
3

%I #6 Oct 18 2019 21:29:16

%S 1,6,36,41,386,391,421,426,5006,5011,5041,5046,5391,5396,5426,5431,

%T 85086,85091,85121,85126,85471,85476,85506,85511,90091,90096,90126,

%U 90131,90476,90481,90511,90516,1616616,1616621,1616651,1616656,1617001,1617006,1617036,1617041,1621621,1621626,1621656,1621661,1622006,1622011

%N Row 3 of A328464: a(n) = A276156(8n - 4) / 6.

%H Antti Karttunen, <a href="/A328466/b328466.txt">Table of n, a(n) for n = 1..8192</a>

%H <a href="/index/Pri#primorialbase">Index entries for sequences related to primorial base</a>

%F a(n) = (1/6) * A276156(8*n - 4).

%o (PARI)

%o A002110(n) = prod(i=1,n,prime(i));

%o A276156(n) = { my(p=2,pr=1,s=0); while(n,if(n%2,s += pr); n >>= 1; pr *= p; p = nextprime(1+p)); (s); };

%o A328466(n) = (A276156((8*n)-4) / 6);

%Y Row 3 of A328464.

%Y Cf. A002110, A276156, A328461.

%K nonn

%O 1,2

%A _Antti Karttunen_, Oct 18 2019