This site is supported by donations to The OEIS Foundation.

 Please make a donation to keep the OEIS running. We are now in our 55th year. In the past year we added 12000 new sequences and reached 8000 citations (which often say "discovered thanks to the OEIS"). We need to raise money to hire someone to manage submissions, which would reduce the load on our editors and speed up editing. Other ways to donate

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A068177 a(1) = 3; for n>1, a(n) is the smallest square > a(n-1) obtained by inserting digits into a(n-1). 4
 3, 36, 361, 32761, 323761, 32137561, 3211375561, 321113755561, 32111137555561, 3211111375555561, 321111113755555561, 32111111137555555561, 3211111111375555555561, 321111111113755555555561 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS EXAMPLE a(2)=36, hence a(3) = 361 the smallest square formed from 36. CROSSREFS Cf. A068175, A068176, A091876 gives square roots. Sequence in context: A026121 A055303 A274403 * A249894 A099670 A259131 Adjacent sequences:  A068174 A068175 A068176 * A068178 A068179 A068180 KEYWORD base,nonn AUTHOR Amarnath Murthy, Feb 25 2002 EXTENSIONS Corrected and extended by Ray Chandler, Oct 11 2003 STATUS approved

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

Last modified December 6 14:47 EST 2019. Contains 329806 sequences. (Running on oeis4.)