OFFSET
0,3
LINKS
Jon E. Schoenfield, Table of n, a(n) for n = 0..10000
EXAMPLE
a(13)=131328 is the smallest triangular number that contains the digit string '13' in its exact center.
CROSSREFS
KEYWORD
easy,nonn,base
AUTHOR
Erich Friedman, Jul 04 2001
EXTENSIONS
Corrected by Harvey P. Dale, Jul 20 2001
a(42)-a(44) from Jon E. Schoenfield, Dec 25 2018
STATUS
approved