Row sums of a characteristic triangle for the Fibonacci numbers.

Terms

a(0) =1a(1) =0a(2) =-1a(3) =-4a(4) =-11a(5) =-30a(6) =-79a(7) =-208a(8) =-545a(9) =-1428a(10) =-3739a(11) =-9790a(12) =-25631a(13) =-67104a(14) =-175681a(15) =-459940a(16) =-1204139a(17) =-3152478a(18) =-8253295a(19) =-21607408a(20) =-56568929a(21) =-148099380a(22) =-387729211a(23) =-1015088254a(24) =-2657535551a(25) =-6957518400a(26) =-18215019649a(27) =-47687540548a(28) =-124847601995a(29) =-326855265438