a(n) is the least positive integer such that for 1 <= k <= n, the concatenation of the k terms a(n-k+1) through a(n) is a multiple of k.
A096085
a(n) is the least positive integer such that for 1 <= k <= n, the concatenation of the k terms a(n-k+1) through a(n) is a multiple of k.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =4a(4) =20a(5) =60a(6) =340a(7) =920a(8) =600a(9) =1000a(10) =14240a(11) =31560a(12) =100120a(13) =140960a(14) =315960a(15) =314800a(16) =7523840a(17) =1020480a(18) =109764640a(19) =66757520a(20) =23256960a(21) =2200720a(22) =1260893360a(23) =1059221040a(24) =16184204800a(25) =34159566800a(26) =18162880800a(27) =68345405200
External references
- oeis: A096085