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 A104301 Primes which are the reverse concatenation of two consecutive square numbers. 5
 41, 6449, 196169, 576529, 11561089, 14441369, 27042601, 38443721, 51845041, 60845929, 67246561, 84648281, 1081610609, 2073620449, 2190421609, 2822427889, 3240032041, 4000039601, 4326442849, 5017649729, 5290052441, 6250062001 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS EXAMPLE The first term is 41 which is a prime and is the reverse concatenation of 1 and 4 which are two consecutive square numbers. PROG (Python) from sympy import isprime A104301_list = [] for n in range(1, 2000): ....x = int(str((n+1)**2)+str(n**2)) ....if isprime(x): ........A104301_list.append(x) # Chai Wah Wu, Sep 13 2014 CROSSREFS These are the primes in A246972. Cf. A104242. Sequence in context: A091758 A208255 A221325 * A221300 A221377 A160477 Adjacent sequences:  A104298 A104299 A104300 * A104302 A104303 A104304 KEYWORD base,nonn AUTHOR Shyam Sunder Gupta, Apr 17 2005 STATUS approved

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Last modified December 12 09:36 EST 2019. Contains 329953 sequences. (Running on oeis4.)