OFFSET
1,2
COMMENTS
The sides of the successive triangles are given by A158031. Terms computed by Jean-Marc Falcoz.
LINKS
Eric Angelini, Digit Spiral
E. Angelini, Digit Spiral [Cached copy, with permission]
EXAMPLE
...0....0....0.....0
........13...13....13
.............610...610
...................1521
The triangular numbers fitting exactly in the SE corner of the above triangles are 0, 3, 10, 21.
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Eric Angelini, Mar 11 2009
STATUS
approved