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

Author

Reinhard Zumkeller, May 08 2015

Keywords

• nonn

Comments

See A106039 for definition of Belgian-k numbers.

row lengths in A257770;

a(A257785(n)) = 1;

For n > 1: a(A007088(n)) = 10.

Links

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

Crossrefs

Cf. A106039, A257770, A257785, A007088.

Programs

Haskell

a257773 = length . a257770_row