A136248 - OEIS

%I #4 Mar 30 2012 18:34:49

%S 1,1,1,1,1,1,3,4,6,4,3,1,1,7,13,26,31,31,25,13,6,1,1,15,40,100,171,

%T 220,255,215,156,85,35,10,1

%N Triangle H4 read by rows: see link for definition.

%C Row n has 3n+1 terms.

%H Gottfried Helms, <a href="/A136206/a136206.txt">Comments on A136206 and A136248</a>

%e Triangle begins:

%e 1

%e 1 1 1 1

%e 1 3 4 6 4 3 1

%e 1 7 13 26 31 31 25 13 6 1

%e 1 15 40 100 171 220 255 215 156 85 35 10 1

%K nonn,tabf

%O 1,7

%A _Gottfried Helms_, Apr 16 2008