OFFSET
1,3
COMMENTS
For i >= 0, 69^i6 is a term with corresponding palindrome 48(99)^{2*i}84, where ^ is repeated concatenation. - Michael S. Branicky, Jan 24 2022
LINKS
Michael S. Branicky, Table of n, a(n) for n = 1..58
Patrick De Geest, Palindromic Quasipronics of the form n(n+x)
Erich Friedman, What's Special About This Number? (See entries 696, 2235, 2828, 6996, 9394.)
MATHEMATICA
Select[Range[0, 8*10^6], PalindromeQ[#(#+8)]&] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, May 28 2017 *)
PROG
(Python)
from itertools import count, islice
def ispal(n): s = str(n); return s == s[::-1]
def agen():
for k in count(0):
if ispal(k*(k+8)):
yield k
print(list(islice(agen(), 35))) # Michael S. Branicky, Jan 24 2022
CROSSREFS
KEYWORD
nonn,base
AUTHOR
EXTENSIONS
a(36) and beyond from Michael S. Branicky, Jan 24 2022
STATUS
approved