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!)
 A139284 Analog of A121805, but starting with 2. 3
 2, 24, 71, 89, 180, 181, 192, 214, 256, 319, 413, 447, 522, 547, 623, 659, 756, 824, 872, 901, 920, 929, 1020, 1021, 1032, 1053, 1084, 1125, 1176, 1237, 1308, 1389, 1480, 1481, 1492, 1513, 1544, 1585, 1636, 1697, 1768, 1849, 1940, 1941, 1952, 1973, 2005 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS It appears that this sequence and A121805 have no terms in common. Furthermore, this sequence exists for at least 1551000000 terms. - Jacques ALARDET, Jul 22 2008 The last term of the sequence is a(194697747222394) = 9999999999999918. - Giovanni Resta, Nov 30 2019 REFERENCES E. Angelini, "Jeux de suites", in Dossier Pour La Science, pp. 32-35, Volume 59 (Jeux math'), April/June 2008, Paris. LINKS Carlos Rivera, Puzzle 980. The "Commas" sequence, The Prime Puzzles and Problems Connection. MAPLE a:= proc(n) option remember; local k, t, y; if n=1 then 2 else k:= a(n-1); for y from 0 to 9 do t:= k +10* irem (k, 10) +y; if convert (t, base, 10)[ -1]=y then return t fi od; NULL fi end: seq(a(n), n=1..80); # Alois P. Heinz, Aug 13 2009 MATHEMATICA a[1] = 2; a[n_] := a[n] = For[x=Mod[a[n-1], 10]; y=0, y <= 9, y++, an = a[n-1] + 10*x + y; If[y == IntegerDigits[an][[1]], Return[an]]]; Array[a, 80] (* Jean-François Alcover, Nov 25 2014 *) CROSSREFS Cf. A121805. Sequence in context: A068878 A100918 A152965 * A003614 A195189 A119060 Adjacent sequences:  A139281 A139282 A139283 * A139285 A139286 A139287 KEYWORD nonn,base,fini,changed AUTHOR N. J. A. Sloane (based on Angelini's article), Jun 08 2008 EXTENSIONS More terms from Alois P. Heinz, Aug 13 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 10 20:38 EST 2019. Contains 329909 sequences. (Running on oeis4.)