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A104612
Write the natural numbers in base 8 in a triangle with k digits in the k-th row, as shown below. Sequence gives the leading diagonal.
15
1, 3, 6, 1, 3, 6, 2, 2, 2, 7, 4, 5, 1, 0, 1, 0, 1, 1, 2, 1, 1, 5, 1, 1, 0, 2, 2, 3, 2, 2, 7, 3, 3, 3, 3, 3, 0, 4, 4, 5, 4, 5, 2, 5, 5, 0, 6, 6, 6, 7, 7, 4, 7, 0, 1, 1, 0, 5, 1, 3, 2, 1, 1, 1, 2, 2, 1, 3, 5, 3, 1, 1, 4, 7, 3, 5, 0, 6, 1, 1, 7, 4, 7, 1, 3, 0, 2, 2, 1, 1, 5, 7, 6, 3, 2, 2, 4, 6, 4, 0, 1, 6, 2, 2, 0
OFFSET
1,2
COMMENTS
1
23
456
7101
11213
141516...
MATHEMATICA
t = Flatten[ IntegerDigits[ Range[1750], 8]]; t[[Table[n(n + 1)/2, {n, 105}]]]
TakeList[Flatten[IntegerDigits[Range[3000], 8]], Range[150]][[All, -1]] (* Harvey P. Dale, Nov 06 2022 *)
KEYWORD
base,nonn
AUTHOR
Robert G. Wilson v, Mar 16 2005
STATUS
approved