OFFSET
1,2
LINKS
Eric Angelini, Échecs et Maths, Personal blog, bottom of page.
EXAMPLE
The largest digit of the sum 1 + 9 = 10 is 1
the largest digit of the sum 9 + 81 = 90 is 9
the largest digit of the sum 81 + 2 = 83 is 8
the largest digit of the sum 2 + 8 = 10 is 1
the largest digit of the sum 8 + 4 = 12 is 2
the largest digit of the sum 4 + 14 = 18 is 8, etc.
We see that the last column reproduces the successive digits of the sequence.
MATHEMATICA
a[1]=1; a[n_]:=a[n]=(k=1; While[Max[s=IntegerDigits[k+a[n-1]]] !=Flatten[IntegerDigits/@Array[a, n-1]][[n-1]] ||MemberQ[IntegerDigits[k], 0] ||MemberQ[Array[a, n-1], k], k++]; k); Array[a, 67] (* Giorgos Kalogeropoulos, Jul 11 2023 *)
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Eric Angelini, Jul 03 2023
STATUS
approved