OFFSET
1,1
COMMENTS
Since every integer appears exactly once in the first column of the Catalan triangle, this sequence lists perfect powers that appear in any other column of the triangle. Pell's equation can be used to prove that infinitely many perfect squares appear in this sequence.
LINKS
Nathaniel Benjamin, Grant Fickes, Eugene Fiorini, Edgar Jaramillo Rodriguez, Eric Jovinelly, Tony W. H. Wong, Primes and Perfect Powers in the Catalan Triangle, J. Int. Seq., Vol. 22 (2019), Article 19.7.6.
Eric Jovinelly, Python program
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Eric Jovinelly, Eugene Fiorini, Jul 19 2018
EXTENSIONS
a(9)-a(16) from Giovanni Resta, Jul 29 2018
STATUS
approved