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A228355 Write the primes backwards in base 10 and juxtapose their digits. 3

%I #28 Apr 26 2022 07:45:15

%S 2,3,5,7,1,1,3,1,7,1,9,1,3,2,9,2,1,3,7,3,1,4,3,4,7,4,3,5,9,5,1,6,7,6,

%T 1,7,3,7,9,7,3,8,9,8,7,9,1,0,1,3,0,1,7,0,1,9,0,1,3,1,1,7,2,1,1,3,1,7,

%U 3,1,9,3,1,9,4,1,1,5,1,7,5,1,3,6,1,7,6

%N Write the primes backwards in base 10 and juxtapose their digits.

%C Also, decimal expansion of the constant 0.235711317191329213731434743595...

%C The same sequence, but with different indexing, would arise for the table whose n-th row lists the A097944(n) digits of the n-th prime A000040(n) from right to left. - _M. F. Hasler_, Oct 24 2019

%H Vincenzo Librandi, <a href="/A228355/b228355.txt">Table of n, a(n) for n = 0..2000</a>

%t Reverse[IntegerDigits//@ Reverse@Prime@Range@50//Flatten]

%o (PARI) fromdigits( A=concat(apply( row(n)=Vecrev(digits(prime(n))), [1..default(realprecision)])))*.1^#A \\ Result = the constant, A = sequence of digits, row(n) = n-th row of the table. - _M. F. Hasler_, Oct 24 2019

%Y Cf. A004087, A007376, A033308.

%K nonn,base,cons

%O 0,1

%A _Vincenzo Librandi_, Aug 21 2013

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Last modified April 16 10:37 EDT 2024. Contains 371709 sequences. (Running on oeis4.)