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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
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),
Sequence in context: A234583 A234584 A234585 * A027656 A142150 A276457
KEYWORD
nonn,tabf,base
AUTHOR
Reinhard Zumkeller, May 08 2015
STATUS
approved

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Last modified July 25 12:21 EDT 2024. Contains 374588 sequences. (Running on oeis4.)