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A198163 Primes from merging of 3 successive digits in decimal expansion of sqrt(2). 27

%I #16 Dec 14 2014 06:20:22

%S 421,373,887,569,967,769,317,797,379,907,107,503,641,157,727,229,149,

%T 709,659,557,571,701,109,599,997,971,919,523,839,397,251,463,331,829,

%U 523,239,547,457,877,599,617,983,557,337,857,701,113,997,503,277,823,929

%N Primes from merging of 3 successive digits in decimal expansion of sqrt(2).

%C Leading zeros are not permitted, so each term is 3 digits in length.

%H Vincenzo Librandi, <a href="/A198163/b198163.txt">Table of n, a(n) for n = 1..2000</a>

%t With[{len=3},Select[FromDigits/@Partition[RealDigits[Sqrt[2],10,1000][[1]], len,1],IntegerLength[#]==len&&PrimeQ[#]&]]

%Y Cf. A103773, A103789, A103793, A103808, A103809, A103810, A103811, A103812, A104824, A104825, A104826, A104843, A104844, A104845, A104846, A104847, A104848, A104849, A104850, A198161, A198162, A198164, A198165, A198166, A198167, A198168, A198169, A198170, A198171, A198172, A198173, A198174, A198175, A104851, A198177.

%K nonn,base

%O 1,1

%A _Harvey P. Dale_, Oct 21 2011

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Last modified April 24 13:30 EDT 2024. Contains 371957 sequences. (Running on oeis4.)