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%I #16 Jan 30 2022 23:04:56
%S 0,6,66,414,696,41814,42224,666666,4282824,4754574,4881884,416343614,
%T 630939036,4159669514,6817557186,42877777824,4163250523614,
%U 4783601063874,4986733376894,47431877813474,6333914444193336,44653247574235644,62141509790514126
%N Palindromes of the form k*(k+5).
%H Michael S. Branicky, <a href="/A028559/b028559.txt">Table of n, a(n) for n = 1..27</a>
%H Patrick De Geest, <a href="http://www.worldofnumbers.com/consemor.htm">Palindromic Quasipronics of the form n(n+x)</a>
%F a(n) = A028558(n) * (A028558(n) + 5). - _Michael S. Branicky_, Jan 30 2022
%o (Python)
%o from itertools import count, islice
%o def ispal(n): s = str(n); return s == s[::-1]
%o def agen():
%o for k in count(0):
%o if ispal(k*(k+5)):
%o yield k*(k+5)
%o print(list(islice(agen(), 20))) # _Michael S. Branicky_, Jan 30 2022
%Y Cf. A028557, A028558.
%K nonn,base
%O 1,2
%A _Patrick De Geest_
%E a(21) and beyond from _Michael S. Branicky_, Jan 30 2022
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