A127424 Numbers whose decimal expansion is a concatenation of 3 consecutive decreasing numbers.

210, 321, 432, 543, 654, 765, 876, 987, 1098, 11109, 121110, 131211, 141312, 151413, 161514, 171615, 181716, 191817, 201918, 212019, 222120, 232221, 242322, 252423, 262524, 272625, 282726, 292827, 302928, 313029, 323130, 333231, 343332, 353433, 363534

Offset: 1

Author

Artur Jasinski, Jan 14 2007

Keywords

• nonn
• base

Examples

			a(13)=141312 because 14 and 13 and 12 are three consecutive decreasing numbers
		

Crossrefs

Cf. A127421-A127424.

Programs

Mathematica

Table[FromDigits[Flatten[IntegerDigits[#]&/@Range[n,n-2,-1]]],{n,2,40}] (* Harvey P. Dale, Nov 28 2013 *)

Extensions

Corrected and extended by Harvey P. Dale, Nov 28 2013