OFFSET
1,3
COMMENTS
Cited from Ian Stewart's article "Tales of a Neglected Number": "Some Padovan numbers, such as 9, 16 and 49, are perfect squares - are there others?"
No other terms < 10^(10^5). - Chai Wah Wu, Aug 31 2017
LINKS
Ian Stewart, Tales of a Neglected Number, Mathematical Recreations, Scientific American, June 1996.
Ian Stewart, Tales of a Neglected Number, Mathematical Recreations, Scientific American, Vol. 274, No. 6 (1996), pp. 102-103.
Ian Stewart, Die unscheinbare Schwester der goldenen Zahl, Spektrum der Wissenschaft, Dossier 02/2003: Mathematische Unterhaltungen II, 55-57.
CROSSREFS
KEYWORD
nonn,more,hard
AUTHOR
Hugo Pfoertner, Aug 31 2017
STATUS
approved