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A034307
Numbers n such that there are no oblong (promic) palindromes of length n.
7
2, 5, 9, 12, 18, 20, 30, 34
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OFFSET
1,1
LINKS
Table of n, a(n) for n=1..8.
P. De Geest,
Palindromic pronic numbers of the form n(n+1)
CROSSREFS
Cf.
A002378
,
A028336
,
A028337
.
Sequence in context:
A056549
A034806
A226822
*
A239876
A070828
A112988
Adjacent sequences:
A034304
A034305
A034306
*
A034308
A034309
A034310
KEYWORD
nonn
,
base
,
hard
AUTHOR
Patrick De Geest
, Oct 15 1998
STATUS
approved
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Last modified April 24 04:02 EDT 2024. Contains 371918 sequences. (Running on oeis4.)