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A029955 Palindromic in base 9. 23
0, 1, 2, 3, 4, 5, 6, 7, 8, 10, 20, 30, 40, 50, 60, 70, 80, 82, 91, 100, 109, 118, 127, 136, 145, 154, 164, 173, 182, 191, 200, 209, 218, 227, 236, 246, 255, 264, 273, 282, 291, 300, 309, 318, 328, 337, 346, 355, 364, 373, 382, 391, 400, 410, 419, 428, 437 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

T. D. Noe, Table of n, a(n) for n = 1..10000

P. De Geest, Palindromic numbers beyond base 10

MATHEMATICA

f[n_, b_] := Module[{i=IntegerDigits[n, b]}, i==Reverse[i]]; lst={}; Do[If[f[n, 9], AppendTo[lst, n]], {n, 1000}]; lst (* Vladimir Joseph Stephan Orlovsky, Jul 08 2009 *)

PROG

(Python)

from gmpy2 import digits

def palQgen(l, b): # generator of palindromes in base b of length <= 2*l

....if l > 0:

........yield 0

........for x in range(1, l+1):

............for y in range(b**(x-1), b**x):

................s = digits(y, b)

................yield int(s+s[-2::-1], b)

............for y in range(b**(x-1), b**x):

................s = digits(y, b)

................yield int(s+s[::-1], b)

A029955_list = list(palQgen(4, 9)) # Chai Wah Wu, Dec 01 2014

CROSSREFS

Palindromes in bases 2 through 10: A006995, A014190, A014192, A029952, A029953, A029954, A029803, A029955, A002113.

Sequence in context: A048306 A043712 A296709 * A297268 A048320 A037407

Adjacent sequences:  A029952 A029953 A029954 * A029956 A029957 A029958

KEYWORD

nonn,base

AUTHOR

Patrick De Geest

STATUS

approved

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Last modified December 10 12:33 EST 2018. Contains 318047 sequences. (Running on oeis4.)