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A328468 Row 5 of A328464: a(n) = A276156(32n - 16) / 210. 3

%I #6 Oct 18 2019 21:28:26

%S 1,12,144,155,2432,2443,2575,2586,46190,46201,46333,46344,48621,48632,

%T 48764,48775,1062348,1062359,1062491,1062502,1064779,1064790,1064922,

%U 1064933,1108537,1108548,1108680,1108691,1110968,1110979,1111111,1111122,30808064,30808075,30808207,30808218,30810495,30810506,30810638,30810649

%N Row 5 of A328464: a(n) = A276156(32n - 16) / 210.

%H Antti Karttunen, <a href="/A328468/b328468.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) = (1/210) * A276156(32*n - 16).

%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 A328468(n) = (A276156((32*n)-16) / 210);

%Y Row 5 of A328464.

%Y Cf. A002110, A276156, A328461.

%K nonn

%O 1,2

%A _Antti Karttunen_, Oct 18 2019

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Last modified April 19 09:23 EDT 2024. Contains 371782 sequences. (Running on oeis4.)