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 A257770 Table read by rows: numbers k, 0<=k<=9, such that n is a Belgian-k number. 17
 0, 0, 1, 0, 2, 0, 3, 0, 4, 0, 5, 0, 6, 0, 7, 0, 8, 0, 9, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 2, 3, 5, 6, 8, 9, 0, 1, 4, 5, 8, 9, 3, 4, 8, 9, 2, 3, 8, 9, 1, 2, 8, 9, 0, 1, 8, 9, 0, 8, 9, 8, 9, 0, 2, 4, 6, 8, 0, 1, 3, 4, 6, 7, 9, 0 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,5 COMMENTS See A106039 for definition of Belgian-k numbers; T(n,0) = A257778(n); T(n,A257773(n)) = A257779(n); m is a Belgian-0 number iff T(m,0) = 0. LINKS Reinhard Zumkeller, Rows n = 0..1000 of triangle, flattened EXAMPLE The first 100 rows: .   0 | 0                     25 | 2,4,9       50 | 0,5     75 | 3,8 .   1 | 0,1                   26 | 0,2,8       51 | 3,4,9   76 | 4 .   2 | 0,2                   27 | 0,7,9       52 | 3,5     77 | 0,7 .   3 | 0,3                   28 | 6,8         53 | 0,5,8   78 | 3 .   4 | 0,4                   29 | 5,7         54 | 0,4,9   79 | 8 .   5 | 0,5                   30 | 0,3,6,9     55 | 0,5     80 | 0,8 .   6 | 0,6                   31 | 0,3,4,7,8   56 | 1,7     81 | 0,1,9 .   7 | 0,7                   32 | 2,4,7,9     57 | 4,9     82 | 2,4 .   8 | 0,8                   33 | 0,3,6,9     58 | 1,6     83 | 6,9 .   9 | 0,9                   34 | 3,6         59 | 3       84 | 0,4 .  10 | 0,1,2,3,4,5,6,7,8,9   35 | 0,3,8       60 | 0,6     85 | 7 .  11 | 0,1,2,3,4,5,6,7,8,9   36 | 0,6,9       61 | 5,6     86 | 2,8 .  12 | 0,2,3,5,6,8,9         37 | 4,7         62 | 0,6,8   87 | 4 .  13 | 0,1,4,5,8,9           38 | 2,5         63 | 0,3,9   88 | 0,8 .  14 | 3,4,8,9               39 | 0,3         64 | 4,8     89 | 4 .  15 | 2,3,8,9               40 | 0,4,8       65 | 4       90 | 0,9 .  16 | 1,2,8,9               41 | 1,2,6,7     66 | 0,6     91 | 1,2 .  17 | 0,1,8,9               42 | 0,2,6,8     67 | 2,9     92 | 4,6 .  18 | 0,8,9                 43 | 1,4,8       68 | 6       93 | 0,9 .  19 | 8,9                   44 | 0,4,8       69 | 3,9     94 | 3,7 .  20 | 0,2,4,6,8             45 | 0,5,9       70 | 0,7     95 | 2 .  21 | 0,1,3,4,6,7,9         46 | 2,6         71 | 0,7,8   96 | 6 .  22 | 0,2,4,6,8             47 | 3           72 | 0,2,9   97 | 1,8 .  23 | 1,3,6,8               48 | 0,8         73 | 3,6     98 | 4 .  24 | 0,4,6                 49 | 6           74 | 1,8     99 | 0,9  . PROG (Haskell) a257770 n k = a257770_tabf !! n !! k a257770_row n = filter belge [0..9] where    belge k = n == (head \$ dropWhile (< n) \$                   scanl (+) k \$ cycle \$ (map (read . return) . show) n) a257770_tabf = map a257770_row [0..] CROSSREFS Cf. A257773 (row lengths), A257778 (min per row), A257778 (max per row), Belgian-k numbers, k=0..9: A106039, A106439, A106518, A106596, A106631, A106792, A107014, A107018, A107032, A107043. Sequence in context: A234583 A234584 A234585 * A027656 A142150 A276457 Adjacent sequences:  A257767 A257768 A257769 * A257771 A257772 A257773 KEYWORD nonn,tabf,base AUTHOR Reinhard Zumkeller, May 08 2015 STATUS approved

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Last modified April 17 05:36 EDT 2021. Contains 343059 sequences. (Running on oeis4.)