# Greetings from The On-Line Encyclopedia of Integer Sequences! http://oeis.org/ Search: id:a107028 Showing 1-1 of 1 %I A107028 #3 Mar 30 2012 18:59:07 %S A107028 1,3,5,9,19,49,155,591,2651,13689,80009,522193,3762273,29629483, %T A107028 252966249,2325176147,22874076091,239615657133,2661015200515, %U A107028 31207545002577,385191232715737,4988767088734625,67615869255979521 %N A107028 Row sums of number triangle A107027. %F A107028 a(n)=sum{k=0..n, (n-k-1)C((n-k)*k, k)-(n-k-2)*sum{j=0..k, C((n-k)*k, j)}} %K A107028 easy,nonn %O A107028 0,2 %A A107028 _Paul Barry_, May 09 2005 # Content is available under The OEIS End-User License Agreement: http://oeis.org/LICENSE