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 A030386 Triangle T(n,k): write n in base 4, reverse order of digits. 24
 0, 1, 2, 3, 0, 1, 1, 1, 2, 1, 3, 1, 0, 2, 1, 2, 2, 2, 3, 2, 0, 3, 1, 3, 2, 3, 3, 3, 0, 0, 1, 1, 0, 1, 2, 0, 1, 3, 0, 1, 0, 1, 1, 1, 1, 1, 2, 1, 1, 3, 1, 1, 0, 2, 1, 1, 2, 1, 2, 2, 1, 3, 2, 1, 0, 3, 1, 1, 3, 1, 2, 3, 1, 3, 3, 1, 0, 0, 2, 1, 0, 2, 2, 0, 2, 3, 0, 2, 0, 1, 2 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 LINKS Reinhard Zumkeller, Rows n = 0..1000 of triangle, flattened EXAMPLE Triangle begins: 0 1 2 3 0, 1 1, 1 2, 1 3, 1 0, 2 1, 2 2, 2 3, 2 0, 3 1, 3 2, 3 3, 3 0, 0, 1 1, 0, 1 ... - Philippe Deléham, Oct 20 2011 MAPLE A030386_row := n -> op(convert(n, base, 4)): seq(A030386_row(n), n=0..36); # Peter Luschny, Nov 28 2017 MATHEMATICA Flatten[Table[Reverse[IntegerDigits[n, 4]], {n, 0, 50}]] (* Harvey P. Dale, Oct 13 2012 *) PROG (PARI) A030386(n, k=-1)=/*k<0&&error("Flattened sequence not yet implemented.")*/n\4^k%4 \\ Assuming that columns are numbered starting with k=0 as in A030308, A030341, ... \\ M. F. Hasler, Jul 21 2013 (Haskell) a030386 n k = a030386_tabf !! n !! k a030386_row n = a030386_tabf !! n a030386_tabf = iterate succ [0] where    succ []     = [1]    succ (3:ts) = 0 : succ ts    succ (t:ts) = (t + 1) : ts -- Reinhard Zumkeller, Sep 18 2015 CROSSREFS Cf. A030308, A030341, A031235, A030567, A031007, A031045, A031087, A031298 for the base-2 to base-10 analogs. Cf. A007090. Sequence in context: A038570 A306559 A103498 * A096799 A243081 A287847 Adjacent sequences:  A030383 A030384 A030385 * A030387 A030388 A030389 KEYWORD nonn,base,tabf,less AUTHOR EXTENSIONS Initial 0 and better name by Philippe Deléham, Oct 20 2011 STATUS approved

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Last modified February 19 19:18 EST 2020. Contains 332047 sequences. (Running on oeis4.)