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A134591 a(n) is n reflected in n-th prime: distance between a(n) and prime(n) equals distance between prime(n) and n. 0

%I #6 Mar 11 2022 12:38:13

%S 3,4,7,10,17,20,27,30,37,48,51,62,69,72,79,90,101,104,115,122,125,136,

%T 143,154,169,176,179,186,189,196,223,230,241,244,263,266,277,288,295,

%U 306,317,320,339,342,349,352,375,398,405,408,415,426,429,448,459,470

%N a(n) is n reflected in n-th prime: distance between a(n) and prime(n) equals distance between prime(n) and n.

%F a(n) = A014689(n) + A000040(n) = 2*A000040(n) - A000027(n).

%F a(n) - prime(n) = prime(n) - n => a(n) = 2*prime(n) - n.

%t Table[2Prime[n]-n,{n,100}]

%o (PARI) a(n) = 2*prime(n) - n; \\ _Michel Marcus_, Mar 11 2022

%Y Cf. A000027, A000040, A014689.

%K nonn

%O 1,1

%A _Zak Seidov_, Nov 04 2007

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Last modified April 19 15:34 EDT 2024. Contains 371794 sequences. (Running on oeis4.)