A139128 Number of distinct representations A005244(n)=A005244(i)*A005244(j)-1.

0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3

Offset

1,28

Comments

A139129 gives the smallest terms in A005244 having exactly n

representations.

Links

R. Zumkeller, Table of n, a(n) for n = 1..500

Eric Weisstein's World of Mathematics, Hofstadter Sequences

Index entries for Hofstadter-type sequences

Example

A005244(28) = 129: a(28) = #{26*5-1,65*2-1} = 2.

Crossrefs

Sequence in context: A093518 A128184 A025450 * A106752 A136441 A030561

Adjacent sequences: A139125 A139126 A139127 * A139129 A139130 A139131

Keyword

nonn

Author

Reinhard Zumkeller, Apr 09 2008

Status

approved