a(n) is the shortest concatenation of two or more decreasing consecutive numbers (n)(n-1)...(0) such that n divides a(n), or n if there is no such concatenation.
A069863
a(n) is the shortest concatenation of two or more decreasing consecutive numbers (n)(n-1)...(0) such that n divides a(n), or n if there is no such concatenation.
Terms
- a(0) =10a(1) =210a(2) =321a(3) =432a(4) =543210a(5) =654a(6) =7a(7) =8765432a(8) =987654321a(9) =109876543210a(10) =11a(11) =1211109876a(12) =13a(14) =151413121110a(15) =1615141312a(16) =171615a(18) =19181716a(19) =20a(20) =21a(22) =23
External references
- oeis: A069863