Diagonal sums of number triangle A184879.

Terms

a(0) =1a(1) =1a(2) =2a(3) =-1a(4) =1a(5) =4a(6) =21a(7) =33a(8) =30a(9) =19a(10) =33a(11) =240a(12) =537a(13) =961a(14) =922a(15) =1223a(16) =2753a(17) =8380a(18) =17725a(19) =27873a(20) =37494a(21) =57627a(22) =132577a(23) =300648a(24) =589953a(25) =942465a(26) =1460146a(27) =2566159a(28) =5351297a(29) =11014388