The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A018232 Consider pairs (k,m) such that k^2 begins with a 1 and when the 1 is changed to a 2 we again get a square, m^2; sequence gives values of m for primitive solutions. 2
 145, 4625, 17225, 454625, 14753125, 53948125, 1425503125, 47063515625, 168971890625, 150145486328125, 529265958203125, 479035044775390625, 1657888279384765625, 1528441794923095703125, 5193483785077392578125, 4877043905134674072265625 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Primitive here means that if (k,m) is a solution, solutions like (10^t*k,10^t*m) are ignored. - Sean A. Irvine, Feb 05 2019 REFERENCES Posting by Noam D. Elkies to netnews circa Oct 15 1992. LINKS Sean A. Irvine, Table of n, a(n) for n = 1..40 Noam D. Elkies, Cliff Puzzle 8: Squares and Squares and Squares, rec.puzzles Archive (pickover), part 29 of 35, 17 Aug 1993. CROSSREFS Cf. A018233. Sequence in context: A264284 A008377 A076464 * A192842 A012813 A031612 Adjacent sequences: A018229 A018230 A018231 * A018233 A018234 A018235 KEYWORD nonn,base AUTHOR N. J. A. Sloane EXTENSIONS Missing terms inserted and more terms from Sean A. Irvine, Feb 05 2019 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified April 23 00:50 EDT 2024. Contains 371906 sequences. (Running on oeis4.)