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A056794
Numbers n such that n*(n-1) is an oblong (promic,
A002378
) palindrome.
0
1, 2, 3, 17, 78, 539, 1622, 2458, 5292, 5314, 52009, 142402, 143499, 1610152, 1713544, 4670029, 5218984, 15137567, 15282412, 15814149, 47370059, 50702752, 142594227, 166691109, 1694576062, 2554554553, 25541432473, 47878213559, 77714915543
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OFFSET
1,2
LINKS
Table of n, a(n) for n=1..29.
MATHEMATICA
Do[c=RealDigits[n*(n-1)][[1]]; If[c=Reverse[c], Print[n]], {n, 1, 10^8}]
PROG
(PARI) is(n)=my(d=digits(n^2-n)); d==Vecrev(d) \\
Charles R Greathouse IV
, Mar 16 2022
CROSSREFS
Cf.
A002378
.
Sequence in context:
A220703
A342547
A245799
*
A135726
A259535
A328340
Adjacent sequences:
A056791
A056792
A056793
*
A056795
A056796
A056797
KEYWORD
nonn
,
base
AUTHOR
Robert G. Wilson v
, Aug 21 2000
EXTENSIONS
More terms from
Sean A. Irvine
, May 09 2022
STATUS
approved
