A257785 -id:A257785 - cp's OEIS frontend

A257773 Number of numbers k, 0 <= k <= 9, such that n is a Belgian-k number.

1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 10, 10, 7, 6, 4, 4, 4, 4, 3, 2, 5, 7, 5, 4, 3, 3, 3, 3, 2, 2, 4, 5, 4, 4, 2, 3, 3, 2, 2, 2, 3, 4, 4, 3, 3, 3, 2, 1, 2, 1, 2, 3, 2, 3, 3, 2, 2, 2, 2, 1, 2, 2, 3, 3, 2, 1, 2, 2, 1, 2, 2, 3, 3, 2, 2, 2, 1, 2, 1, 1, 2, 3, 2, 2, 2, 1

Offset: 0

Reinhard Zumkeller, May 08 2015

nonn

 See A106039 for definition of Belgian-k numbers.
row lengths in A257770;
a(A257785(n)) = 1;
For n > 1: a(A007088(n)) = 10.

Reinhard Zumkeller, Table of n, a(n) for n = 0..10000

Cf. A106039, A257770, A257785, A007088.

Haskell
```
a257773 = length . a257770_row
```

A257778 Smallest k, such that n is a Belgian-k number.

Original entry on oeis.org

0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 2, 1, 0, 0, 8, 0, 0, 0, 1, 0, 2, 0, 0, 6, 5, 0, 0, 2, 0, 3, 0, 0, 4, 2, 0, 0, 1, 0, 1, 0, 0, 2, 3, 0, 6, 0, 3, 3, 0, 0, 0, 1, 4, 1, 3, 0, 5, 0, 0, 4, 4, 0, 2, 6, 3, 0, 0, 0, 3, 1, 3, 4, 0, 3, 8, 0, 0, 2, 6, 0, 7

Offset: 0

Reinhard Zumkeller, May 08 2015

nonn

See A106039 for definition of Belgian-k numbers;
a(n) = A257770(n,0);
a(n) <= A257779(n); a(A257785(n)) = A257779(A257785(n));
conjecture: a(n) < 9;
a(A106039(n)) = 0; a(A257782(n)) > 0.

Reinhard Zumkeller, Table of n, a(n) for n = 0..10000

Cf. A106039, A257770, A257773, A257779, A257782.

Haskell
```
a257778 = head . a257770_row
```

A257779 Largest k, such that n is a Belgian-k number.

Original entry on oeis.org

0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 9, 8, 8, 6, 9, 8, 9, 8, 7, 9, 8, 9, 9, 6, 8, 9, 7, 5, 3, 8, 7, 8, 8, 8, 9, 6, 3, 8, 6, 5, 9, 5, 8, 9, 5, 7, 9, 6, 3, 6, 6, 8, 9, 8, 4, 6, 9, 6, 9, 7, 8, 9, 6, 8, 8, 4, 7, 3, 8, 8, 9, 4, 9, 4, 7

Offset: 0

Reinhard Zumkeller, May 08 2015

nonn

See A106039 for definition of Belgian-k numbers;
a(n) = A257770(n,A257773(n));
a(n) >= A257778(n); a(A257785(n)) = A257778(A257785(n)).

Reinhard Zumkeller, Table of n, a(n) for n = 0..10000

Cf. A106039, A257770, A257773, A257778.

Haskell
```
a257779 = last . a257770_row
```

cp's OEIS Frontend

A257773 Number of numbers k, 0 <= k <= 9, such that n is a Belgian-k number.

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A257778 Smallest k, such that n is a Belgian-k number.

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Author

Keywords

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Programs

Haskell

A257779 Largest k, such that n is a Belgian-k number.

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Author

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Programs

Haskell