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A030386 Triangle T(n,k): write n in base 4, reverse order of digits. 13
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

Table of n, a(n) for n=0..90.

MATHEMATICA

Flatten[Table[Reverse[IntegerDigits[n, 4]], {n, 0, 50}]] (* Harvey P. Dale, Oct 13 2012 *)

PROG

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 ...

- From Philippe Deléham, Oct 20 2011.

CROSSREFS

Sequence in context: A135814 A038570 A103498 * A096799 A106728 A189480

Adjacent sequences:  A030383 A030384 A030385 * A030387 A030388 A030389

KEYWORD

nonn,base,tabf,less

AUTHOR

Clark Kimberling

EXTENSIONS

Initial 0 and better name by Philippe Deléham, Oct 20 2011.

STATUS

approved

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Last modified May 20 02:57 EDT 2013. Contains 225446 sequences.