A062690 Smallest triangular number that contains the string n in its exact center.

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

Author

Erich Friedman, Jul 04 2001

Keywords

• easy
• nonn
• base

Examples

			a(13)=131328 is the smallest triangular number that contains the digit string '13' in its exact center.
		

Links

• Jon E. Schoenfield, Table of n, a(n) for n = 0..10000

Crossrefs

Cf. A018855, A062829.

Extensions

Corrected by Harvey P. Dale, Jul 20 2001

a(42)-a(44) from Jon E. Schoenfield, Dec 25 2018