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A029735 Numbers k such that k^3 is palindromic in base 16. 2
0, 1, 2, 17, 257, 273, 4097, 4369, 65537, 65793, 69649, 1048577, 1052929, 1114129, 16777217, 16781313, 16843009, 16847105, 17825809, 17829905, 268435457, 268505089, 269484289, 285212689, 4294967297, 4295032833, 4296019969, 4296085505, 4311744769, 4563402769 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,3
LINKS
P. De Geest, World!Of Numbers
PROG
(Python)
A029735_list, j = [], 0
for i in range(10**9):
s = format(j, 'x')
if s == s[::-1]:
A029735_list.append(i)
j += 3*i*(i+1)+1 # Chai Wah Wu, Dec 20 2015
(PARI) isok(n) = my(vd = digits(n^3, 16)); Vecrev(vd) == vd; \\ Michel Marcus, Dec 21 2015
(Magma) [n: n in [0..2*10^7] | Intseq(n^3, 16) eq Reverse(Intseq(n^3, 16))]; // Vincenzo Librandi, Dec 22 2015
CROSSREFS
Cf. A029736.
Sequence in context: A099702 A253549 A002590 * A291206 A037896 A099714
KEYWORD
nonn,base
AUTHOR
Patrick De Geest, May 15 1998
EXTENSIONS
a(25)-a(30) from Giovanni Resta, Aug 06 2019
STATUS
approved

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Last modified March 19 04:26 EDT 2024. Contains 370952 sequences. (Running on oeis4.)