|
%I #21 Aug 03 2022 02:34:50
%S 1,2,3,4,5,6,7,8,9,101,202,212,303,313,323,404,414,424,434,505,515,
%T 525,535,545,606,616,626,636,646,656,707,717,727,737,747,757,767,808,
%U 818,828,838,848,858,868,878,909,919,929,939,949,959,969,979,989,2012
%N 1..9 followed by the canyon numbers A134970.
%C For n > 9 the structure of digits represents an abyss. The first digit is equal to the last digit (1 - 9). The first digits are in decreasing order. The last digits are in increasing order. The numbers only have one smallest digit. This sequence is finite. The final term is 9876543210123456789.
%C Superset of crater numbers (A193409). Subset of valley numbers (A193413).
%e Illustration using 654356:
%e 6 . . . . 6
%e . 5 . . 5 .
%e . . 4 . . .
%e . . . 3 . .
%Y Cf. A193409, A193413, A134970.
%K nonn,base,fini
%O 1,2
%A _Jaroslav Krizek_, Jul 25 2011
|
