login
A111381
Least multiple of n as a concatenation of two successive natural numbers k and k+1.
2
10, 10, 12, 12, 10, 12, 21, 32, 45, 910, 1617, 1716, 65, 56, 45, 32, 34, 54, 76, 1920, 1617, 1716, 1817, 1920, 2425, 78, 54, 56, 87, 1110, 2728, 1312, 1617, 3332, 910, 3132, 1110, 76, 78, 1920, 1312, 3738, 2021, 1716, 4140, 4140, 2021, 1920, 98
OFFSET
1,1
COMMENTS
'Multiple' means >1 and we allow either left-to-right or right-to-left concatenations.
CROSSREFS
Cf. A113595.
Sequence in context: A280105 A173198 A377565 * A369604 A063660 A354049
KEYWORD
base,nonn
AUTHOR
Hans Havermann, Nov 08 2005
STATUS
approved