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

1,1

Links

Table of n, a(n) for n=1..35.

Example

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

Mathematica

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

Crossrefs

Cf. A127421-A127424.

Sequence in context: A116200 A125011 A119427 * A074159 A033993 A350373

Adjacent sequences: A127421 A127422 A127423 * A127425 A127426 A127427

Keyword

nonn,base

Author

Artur Jasinski, Jan 14 2007

Extensions

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

Status

approved