Diagonal sums of number triangle A109962.

Terms

a(0) =1a(1) =-1a(2) =5a(3) =-27a(4) =171a(5) =-1178a(6) =8582a(7) =-65029a(8) =507317a(9) =-4047608a(10) =32874104a(11) =-270893586a(12) =2259210814a(13) =-19032956491a(14) =161735556091