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A048331 a(n) in base 6 is a repdigit. 4
0, 1, 2, 3, 4, 5, 7, 14, 21, 28, 35, 43, 86, 129, 172, 215, 259, 518, 777, 1036, 1295, 1555, 3110, 4665, 6220, 7775, 9331, 18662, 27993, 37324, 46655, 55987, 111974, 167961, 223948, 279935, 335923, 671846, 1007769, 1343692, 1679615, 2015539 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..500

Eric Weisstein's World of Mathematics, Repdigit

FORMULA

Conjecture: G.f.: x*(1+2*x+3*x^2+4*x^3+5*x^4) / ( (x-1)*(x^4+x^3+x^2+x+1)*(6*x^5-1) ) with a(n) = 7*a(n-5) -6*a(n-10).. - R. J. Mathar, Mar 15 2015

MATHEMATICA

Union[Flatten[Table[FromDigits[PadRight[{}, n, d], 6], {n, 0, 40}, {d, 5}]]] (* Vincenzo Librandi, Feb 06 2014 *)

CROSSREFS

Cf. A010785, A033019, A028987, A028988.

Sequence in context: A029953 A048317 A037398 * A133476 A131023 A069514

Adjacent sequences:  A048328 A048329 A048330 * A048332 A048333 A048334

KEYWORD

nonn,base

AUTHOR

Patrick De Geest, Feb 15 1999.

STATUS

approved

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Last modified September 15 22:10 EDT 2019. Contains 327088 sequences. (Running on oeis4.)