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A062690
Smallest triangular number that contains the string n in its exact center.
5
0, 1, 120, 3, 741, 153, 6, 171, 780, 190, 10, 111156, 1128, 131328, 2145, 15, 3160, 1176, 4186, 101926, 152076, 21, 1225, 102378, 3240, 5253, 7260, 1275, 28, 232903, 113050, 9316, 1326, 133386, 2346, 5356, 36, 1378, 7381, 133903, 3403, 2415, 124251, 1431, 6441
OFFSET
0,3
LINKS
EXAMPLE
a(13)=131328 is the smallest triangular number that contains the digit string '13' in its exact center.
CROSSREFS
Sequence in context: A267286 A062829 A163598 * A267745 A267025 A127148
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