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A043016 Base-7 palindromes that start with 2. 1
2, 16, 100, 107, 114, 121, 128, 135, 142, 688, 744, 800, 856, 912, 968, 1024, 4804, 4853, 4902, 4951, 5000, 5049, 5098, 5154, 5203, 5252, 5301, 5350, 5399, 5448, 5504, 5553, 5602, 5651, 5700, 5749, 5798, 5854, 5903, 5952, 6001, 6050, 6099, 6148, 6204, 6253 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
Robert P. P. McKone, Table of n, a(n) for n = 1..800
MATHEMATICA
okQ[n_] := Module[{idn = IntegerDigits[n, 7]}, First[idn] == 2 && FromDigits[ IntegerDigits[ n, 7]] == FromDigits[Reverse[idn]]]; Select[Range[6253], okQ] // Parallelize (* Robert P. P. McKone, Aug 22 2021, after Harvey P. Dale *)
CROSSREFS
Sequence in context: A207913 A208694 A319603 * A197202 A361814 A032260
KEYWORD
nonn,base
AUTHOR
EXTENSIONS
More terms from Robert P. P. McKone, Aug 22 2021
STATUS
approved

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Last modified February 28 04:16 EST 2024. Contains 370379 sequences. (Running on oeis4.)