OFFSET
1,1
COMMENTS
REFERENCES
D. Wells, 63504 entry, The Penguin Dictionary of Curious and Interesting Numbers. Penguin Books, NY, 1986, Revised edition 1997, p. 168.
LINKS
Chai Wah Wu, Table of n, a(n) for n = 1..1672
David A. Corneth, Examples of factorizations of terms in exactly two or three ways.
Shyam Sunder Gupta, EPRN Numbers.
EXAMPLE
1) Squares without trailing zeros:
Even square: 7683984 = 2772^2 = 2772 * 2772 = 1584 * 4851.
Odd square: 1239016098321 = 1113111^2 = 1113111 * 1113111 = 1022121 * 1212201.
2) Squares with trailing zeros:
1st case: 16240900 = 4030^2 = 16900 * 961 = 96100 * 169.
2nd case: 435600 = 660^2 = 6600 * 66 = 528 * 825.
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Bernard Schott, Apr 03 2019
EXTENSIONS
Corrected terms by Chai Wah Wu, Apr 12 2019
Definition corrected by N. J. A. Sloane, Aug 01 2019
STATUS
approved