1,7

A062295 is the sequence of smallest squares such that the pairwise sums of not necessarily distinct elements are all distinct, whereas A133743 is the sequence of smallest squares such that the pairwise sums of distinct elements are all distinct.

Klaus Brockhaus, Table of n, a(n) for n = 1..4944

a(7) = A062295(7) - A133743(7) = 64 - 49 = 15.

Cf. A062295, A133743, A133745.

Sequence in context: A169728 A167054 A241680 * A031112 A219394 A330522

Adjacent sequences: A133741 A133742 A133743 * A133745 A133746 A133747

sign

Klaus Brockhaus, Sep 24 2007

approved