A141701 - OEIS

%I #3 Jul 03 2016 00:15:24

%S 0,2,0,3,0,0,4,2,0,0,5,0,0,0,0,5,3,2,0,0,0,7,0,0,0,0,0,0,6,4,0,2,0,0,

%T 0,0,6,0,3,0,0,0,0,0,0,7,5,0,0,2,0,0,0,0,0,11,0,0,0,0,0,0,0,0,0,0,7,5,

%U 4,3,0,2,0,0,0,0,0,0,13,0,0,0,0,0,0,0,0,0,0,0,0,9,7,0,0,0,0,2,0,0,0,0,0,0,0

%N Triangle read by rows: A001414 interleaved with (k-1) zeros.

%C A005843 seems to begin over an over again at row indices equal to powers of two. Similarly A008585 repeats itself at row indices equal to powers of three.

%o (Excel) =if(row()>=column();if(mod(row();column())=0;lookup(row()/column();A000027;A001414;0);")

%Y Cf. A001414, A005843, A008585.

%K nonn,tabl

%O 1,2

%A _Mats Granvik_, Jun 30 2008, Jul 01 2008