A090490 For n > 1, a(n) is the least multiple of n that can be obtained by adding one digit to each end of a(n-1).

1, 110, 11100, 1111000, 111110000, 11111100000, 1111111000006, 111111110000064, 11111111100000648, 1111111111000006480, 111111111110000064800, 11111111111100000648000, 1111111111111000006480005, 111111111111110000064800052, 11111111111111100000648000525

Offset: 1

Author

Amarnath Murthy, Dec 03 2003

Keywords

• base
• nonn
• easy
• fini
• full

Comments

Sequence has 15 terms. No multiple of 16 can be obtained in this way from a(15). - David Wasserman, Dec 06 2005

Examples

			a(8) = 111111110000064 is a multiple of 8 and is the concatenation of 1, a(7) and 4.
		

Crossrefs

Cf. A078282.

Extensions

More terms from David Wasserman, Dec 06 2005