A050722 Palindromic triangular numbers arising from A050721 and A083571.

3, 6, 66, 5995, 15051, 15199896744769899151

Offset

1,1

References

Elena Deza and Michel Marie Deza, Figurate numbers, World Scientific Publishing (2012), page 432.

Links

Table of n, a(n) for n=1..6.

Patrick De Geest, Subsets of palindromic triangulars.

Crossrefs

Cf. A008509, A008510, A050721, A083571.

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