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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

Table of n, a(n) for n=1..47.

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-Fran├žois 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

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Last modified December 10 20:38 EST 2019. Contains 329909 sequences. (Running on oeis4.)