OFFSET
1,2
COMMENTS
The number of triangular numbers smaller than n can be found in sequence A002024 because n appears n times.
EXAMPLE
2145 is in the sequence because (1) it is a triangular number, (2) the number of triangular numbers smaller than 2145 is 11 and (3) 2145 is divisible by 11.
CROSSREFS
KEYWORD
nonn
AUTHOR
Luc Stevens (lms022(AT)yahoo.com), Apr 28 2006
STATUS
approved