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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 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS 1 23 456 7101 11213 141516... LINKS Table of n, a(n) for n=1..105. 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 *) CROSSREFS Cf. A104606, A104607, A104608, A104609, A104610, A104611, A104613, A091425, A104614, A104615, A104616, A104617, A104618, A104619, A104620. Sequence in context: A369883 A205005 A113648 * A088392 A195699 A199795 Adjacent sequences: A104609 A104610 A104611 * A104613 A104614 A104615 KEYWORD base,nonn AUTHOR Robert G. Wilson v, Mar 16 2005 STATUS approved

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Last modified August 12 10:21 EDT 2024. Contains 375092 sequences. (Running on oeis4.)