Lexicographically earliest sequence of distinct nonnegative terms such that both a(n) and a(n) * a(n+1) have digits in nondecreasing order.
A342266
Lexicographically earliest sequence of distinct nonnegative terms such that both a(n) and a(n) * a(n+1) have digits in nondecreasing order.
Terms
- a(0) =0a(1) =1a(2) =2a(3) =3a(4) =4a(5) =6a(6) =8a(7) =7a(8) =5a(9) =9a(10) =13a(11) =12a(12) =14a(13) =16a(14) =18a(15) =26a(16) =44a(17) =27a(18) =17a(19) =15a(20) =23a(21) =29a(22) =46a(23) =28a(24) =48a(25) =47a(26) =24a(27) =19a(28) =117a(29) =38
External references
- oeis: A342266