login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A034980 a(n)^2 is smallest positive square starting with a string of n 2's. 2
1, 5, 15, 149, 4714, 47141, 471405, 1490712, 1490712, 471404521, 1490711985, 1490711985, 1490711985, 1490711985, 47140452079103, 149071198499986, 149071198499986, 14907119849998598, 14907119849998598, 471404520791031683, 14907119849998597976, 471404520791031682934, 4714045207910316829339 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..22.

EXAMPLE

a(5)^2 = 47141^2 = {22222}73881.

CROSSREFS

Cf. A034981.

Sequence in context: A207971 A245648 A048347 * A174850 A143048 A261843

Adjacent sequences:  A034977 A034978 A034979 * A034981 A034982 A034983

KEYWORD

nonn,base

AUTHOR

Patrick De Geest, Nov 15 1998

EXTENSIONS

More terms from Francisco Salinas (franciscodesalinas(AT)hotmail.com), Dec 23 2001

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.

License Agreements, Terms of Use, Privacy Policy. .

Last modified January 27 14:39 EST 2020. Contains 331295 sequences. (Running on oeis4.)