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A262437 Triangle T(n,k): write n in base 16, reverse order of digits. 4
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 0, 1, 1, 1, 2, 1, 3, 1, 4, 1, 5, 1, 6, 1, 7, 1, 8, 1, 9, 1, 10, 1, 11, 1, 12, 1, 13, 1, 14, 1, 15, 1, 0, 2, 1, 2, 2, 2, 3, 2, 4, 2, 5, 2, 6, 2, 7, 2, 8, 2, 9, 2, 10, 2, 11, 2, 12, 2, 13, 2, 14, 2, 15, 2 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

Sum(T(n,k)*16^k : k = 0..A262438(n)-1) = n.

LINKS

Reinhard Zumkeller, Rows n = 0..10000 of triangle, flattened

Eric Weisstein's World of Mathematics, Hexadecimal

Wikipedia, Hexadecimal

EXAMPLE

.   n | HEX | T(n,*)        n | HEX | T(n,*)        n | HEX | T(n,*)

. ----+-----+--------     ----+-----+--------     ----+-----+--------

.   0 |   0 |  [0]         24 |  18 |  [8,1]       48 |  30 |  [0,3]

.   1 |   1 |  [1]         25 |  19 |  [9,1]       49 |  31 |  [1,3]

.   2 |   2 |  [2]         26 |  1A |  [10,1]      50 |  32 |  [2,3]

.   3 |   3 |  [3]         27 |  1B |  [11,1]      51 |  33 |  [3,3]

.   4 |   4 |  [4]         28 |  1C |  [12,1]      52 |  34 |  [4,3]

.   5 |   5 |  [5]         29 |  1D |  [13,1]      53 |  35 |  [5,3]

.   6 |   6 |  [6]         30 |  1E |  [14,1]      54 |  36 |  [6,3]

.   7 |   7 |  [7]         31 |  1F |  [15,1]      55 |  37 |  [7,3]

.   8 |   8 |  [8]         32 |  20 |  [0,2]       56 |  38 |  [8,3]

.   9 |   9 |  [9]         33 |  21 |  [1,2]       57 |  39 |  [9,3]

.  10 |   A |  [10]        34 |  22 |  [2,2]       58 |  3A |  [10,3]

.  11 |   B |  [11]        35 |  23 |  [3,2]       59 |  3B |  [11,3]

.  12 |   C |  [12]        36 |  24 |  [4,2]       60 |  3C |  [12,3]

.  13 |   D |  [13]        37 |  25 |  [5,2]       61 |  3D |  [13,3]

.  14 |   E |  [14]        38 |  26 |  [6,2]       62 |  3E |  [14,3]

.  15 |   F |  [15]        39 |  27 |  [7,2]       63 |  3F |  [15,3]

.  16 |  10 |  [0,1]       40 |  28 |  [8,2]       64 |  40 |  [0,4]

.  17 |  11 |  [1,1]       41 |  29 |  [9,2]       65 |  41 |  [1,4]

.  18 |  12 |  [2,1]       42 |  2A |  [10,2]      66 |  42 |  [2,4]

.  19 |  13 |  [3,1]       43 |  2B |  [11,2]      67 |  43 |  [3,4]

.  20 |  14 |  [4,1]       44 |  2C |  [12,2]      68 |  44 |  [4,4]

.  21 |  15 |  [5,1]       45 |  2D |  [13,2]      69 |  45 |  [5,4]

.  22 |  16 |  [6,1]       46 |  2E |  [14,2]      70 |  46 |  [6,4]

.  23 |  17 |  [7,1]       47 |  2F |  [15,2]      71 |  47 |  [7,4]

.  24 |  18 |  [8,1]       48 |  30 |  [0,3]       72 |  48 |  [8,4]  .

PROG

(Haskell)

a262437 n k = a262437_tabf !! n !! k

a262437_row n = a262437_tabf !! n

a262437_tabf = iterate succ [0] where

   succ []      = [1]

   succ (15:hs) = 0 : succ hs

   succ (h:hs)  = (h + 1) : hs

CROSSREFS

Cf. A001025, A262438 (row lengths), A030308 (binary), A030341 (ternary), A031298 (decimal).

Sequence in context: A323372 A295300 A139179 * A130909 A275993 A160700

Adjacent sequences:  A262434 A262435 A262436 * A262438 A262439 A262440

KEYWORD

nonn,tabf,base

AUTHOR

Reinhard Zumkeller, Sep 22 2015

STATUS

approved

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Last modified July 11 20:03 EDT 2020. Contains 335652 sequences. (Running on oeis4.)