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A050722
Palindromic triangular numbers arising from
A050721
and
A083571
.
3
3, 6, 66, 5995, 15051, 15199896744769899151
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OFFSET
1,1
LINKS
Table of n, a(n) for n=1..6.
P. De Geest,
Subsets of palindromic triangulars
CROSSREFS
Cf.
A008509
,
A008510
,
A050721
.
Sequence in context:
A306451
A068665
A229236
*
A069502
A296374
A362822
Adjacent sequences:
A050719
A050720
A050721
*
A050723
A050724
A050725
KEYWORD
nonn
,
base
,
hard
AUTHOR
Patrick De Geest
, Sep 15 1999
STATUS
approved
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Last modified July 26 23:00 EDT 2024. Contains 374636 sequences. (Running on oeis4.)