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A001219 Triangular numbers of form a(a+1)(a+2). 3
0, 6, 120, 210, 990, 185136, 258474216 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

REFERENCES

R. K. Guy, Unsolved Problems in Number Theory, D3.

LINKS

Eric Weisstein's World of Mathematics, Link to a section of The World of Mathematics.

CROSSREFS

Sequence in context: A127726 A117063 A178911 * A076233 A066581 A054776

Adjacent sequences:  A001216 A001217 A001218 * A001220 A001221 A001222

KEYWORD

nonn,fini,full

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

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Last modified February 17 06:13 EST 2012. Contains 205991 sequences.