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

 Please make a donation to keep the OEIS running. We are now in our 56th year. In the past year we added 10000 new sequences and reached almost 9000 citations (which often say "discovered thanks to the OEIS"). Other ways to donate

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A048428 a(n)^2 is a square composed of three '2 digit' overlapping subsquares. 1

%I

%S 475,144003,180275,684475,940046,2593211,4750782,4753125,9600192,

%T 10400192,14600128,15002385,15400128,25005012,25005414,39529017,

%U 66466485,85002046,91390165,119600016,120400016,145002533,180027625,194001555,196000703,269400016,270600016

%N a(n)^2 is a square composed of three '2 digit' overlapping subsquares.

%C Subsquares with leading and/or trailing zeros not included. Subsquares must be at least 3 digits long.

%C Solutions

%C n........a(n)....A048427(n) annotated

%C 1.........475................2{256}25

%C 2......144003.........207{36}8{64}009

%C 3......180275.........32{49}907{56}25

%C 4......684475..........4685060{256}25

%C 5......940046........88{36}8{64}82116

%C 6.....2593211.......67{24}743{29}0521

%C 7.....4750782......2{25}69929{61}1524

%C 8.....4753125......2{25}9{21}97265625

%C 9.....9600192......92{16}36864{36}864

%C 10...10400192.....108{16}39936{36}864

%C 11...14600128.....213{16}37376{16}384

%C 12...15002385.....2{25}07155{56}88225

%C 13...15400128.....237{16}39424{16}384

%C 14...25005012.....6{25}2506{25}120144

%C 15...25005414.....6{25}2707{29}311396

%C 16...39529017....156{25}4318{49}86289

%C 17...66466485....4{41}779{36}28255225

%C 18...85002046....72{25}34782{41}86116

%C 19...91390165....835{21}62{25}8727225

%C 20..119600016...14304{16}3827200{25}6

%C 21..120400016...14496{16}3852800{25}6

%C 22..145002533...210{25}73457{64}16089

%C 23..180027625...3{24}09945{76}3140625

%C 24..194001555...376{36}60334{24}18025

%C 25..196000703...384{16}275576{49}4209

%C 26..269400016...72576{36}8620800{25}6

%C 27..270600016...73224{36}8659200{25}6

%C 28..294000702...864{36}412776{49}2804

%C 29..312433184...9761{44}9{44}64377856

%C 30..320016025..10{24}10256{25}6800625

%C - _Lars Blomberg_, May 17 2015

%e 180275^2 = 32499075625 = 32{49}907{56}25; 3249 and 4990756 and 5625 = 57^2 and 2234^2 and 75^2.

%Y Cf. A048427.

%K nonn,base

%O 1,1

%A _Patrick De Geest_, Apr 15 1999

%E Changed offset to 1 and a(7)-a(27) from _Lars Blomberg_, May 17 2015

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 3 20:56 EST 2020. Contains 338920 sequences. (Running on oeis4.)