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!)
 A169601 a(n) = (10^n-1)^2 + 2. 0
 2, 83, 9803, 998003, 99980003, 9999800003, 999998000003, 99999980000003, 9999999800000003, 999999998000000003, 99999999980000000003, 9999999999800000000003, 999999999998000000000003 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 LINKS Index entries for linear recurrences with constant coefficients, signature (111,-1110,1000). FORMULA G.f.: -(2810*x^2-139*x+2)/((x-1)*(100*x-1)*(10*x-1)). MATHEMATICA (10^Range[0, 20]-1)^2+2 (* Harvey P. Dale, Jan 08 2019 *) PROG (PARI) for(n=0, 20, print1((10^n-1)^2+2", ")) CROSSREFS Sequence in context: A232770 A317724 A099373 * A205643 A215263 A265591 Adjacent sequences:  A169598 A169599 A169600 * A169602 A169603 A169604 KEYWORD nonn,easy AUTHOR Jason Earls, Dec 03 2009 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 14 19:27 EST 2019. Contains 329987 sequences. (Running on oeis4.)