A281527 - OEIS

%I #18 Jan 24 2017 02:39:07

%S 1,1,2,1,1,2,1,2,2,2,1,1,1,2,2,1,2,2,2,3,2,1,1,2,1,2,2,2,1,2,1,2,2,2,

%T 3,2,1,1,2,2,1,2,2,2,2,1,2,2,2,2,2,3,3,3,2,1,1,1,1,2,1,2,2,2,2,2,1,2,

%U 2,2,3,2,2,3,3,3,3,2,1,1,2,2,2,2,1,2,2,3,3,2,2,1,2,1,2,1,2,2,2,2,2,3,2,3,2

%N Triangle read by rows: T(n,k) = minimal number of terms needed to write k/n as a signed sum of distinct unit fractions, 1 <= k < n.

%H <a href="/index/Ed#Egypt">Index entries for sequences related to Egyptian fractions</a>

%e The triangle T(n,k) begins:

%e 2:                     1

%e 3:                   1   2

%e 4:                 1   1   2

%e 5:               1   2   2   2

%e 6:             1   1   1   2   2

%e 7:           1   2   2   2   3   2

%e 8:         1   1   2   1   2   2   2

%e 9:       1   2   1   2   2   2   3   2

%Y Cf. A281530.

%K nonn,tabl

%O 2,3

%A _Arkadiusz Wesolowski_, Jan 23 2017