|
| |
|
|
A127423
|
|
a(1) = 1; for n>1, a(n) = n concatenated with n-1.
|
|
0
| |
|
|
1, 21, 32, 43, 54, 65, 76, 87, 98, 109, 1110, 1211, 1312, 1413, 1514, 1615, 1716, 1817, 1918, 2019, 2120, 2221, 2322, 2423, 2524, 2625, 2726, 2827, 2928, 3029, 3130, 3231, 3332, 3433, 3534, 3635, 3736, 3837, 3938, 4039, 4140, 4241, 4342, 4443, 4544, 4645
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,2
|
|
|
COMMENTS
| a(13)=1211 because 12 and 11 are two consecutive decreasing numbers
|
|
|
MAPLE
| c2:=proc(x, y) local s: s:=proc(m) nops(convert(m, base, 10)) end: x*10^s(y)+y: end: seq(c2(n, n-1), n=1..53); - Emeric Deutsch (deutsch(AT)duke.poly.edu), Mar 07 2007
|
|
|
CROSSREFS
| Cf. A127421-A127430.
Sequence in context: A118866 A168005 A118535 * A035137 A075110 A181677
Adjacent sequences: A127420 A127421 A127422 * A127424 A127425 A127426
|
|
|
KEYWORD
| nonn,base
|
|
|
AUTHOR
| Artur Jasinski (grafix(AT)csl.pl), Jan 14 2007
|
|
|
EXTENSIONS
| More terms from Emeric Deutsch (deutsch(AT)duke.poly.edu), Mar 07 2007
|
| |
|
|
