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A050722 Palindromic triangular numbers arising from A050721 and A083571. 3
3, 6, 66, 5995, 15051, 15199896744769899151 (list; graph; refs; listen; history; text; internal format)
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: A127637 A068665 A229236 * A069502 A296374 A205081

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 September 25 15:29 EDT 2018. Contains 315392 sequences. (Running on oeis4.)