A083468
Smallest multiple of n which is the reverse concatenation of n consecutive numbers.0 if no such number exists.
Original entry on oeis.org
1, 32, 321, 5432, 987645, 765432, 22212019181716, 98765432, 987654321, 19181716151413121110, 2019181716151413121110, 1312111098765432, 19181716151413121110987, 2928272625242322212019181716
Offset: 1
Amarnath Murthy and Meenakshi Srikanth (menakan_s(AT)yahoo.com), May 02 2003
A083469
Smallest k such that n*k is a reverse concatenation of n consecutive natural numbers. a(n) = A083468(n)/n.
Original entry on oeis.org
1, 16, 107, 1358, 197529, 127572, 3173145597388, 12345679, 109739369, 1918171615141312111, 183561974195583011010, 109342591563786, 1475516627031778546999, 209162330374451586572798694
Offset: 1
Amarnath Murthy and Meenakshi Srikanth (menakan_s(AT)yahoo.com), May 02 2003