Triangle T, read by rows, where matrix power T^-2 has -2^(n+1) in the secondary diagonal: [T^-2](n+1,n) = -2^(n+1), with all 1's in the main diagonal and zeros elsewhere.
A117265
Triangle T, read by rows, where matrix power T^-2 has -2^(n+1) in the secondary diagonal: [T^-2](n+1,n) = -2^(n+1), with all 1's in the main diagonal and zeros elsewhere.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =3a(4) =2a(5) =1a(6) =20a(7) =12a(8) =4a(9) =1a(10) =280a(11) =160a(12) =48a(13) =8a(14) =1a(15) =8064a(16) =4480a(17) =1280a(18) =192a(19) =16a(20) =1a(21) =473088a(22) =258048a(23) =71680a(24) =10240a(25) =768a(26) =32a(27) =1a(28) =56229888a(29) =30277632
External references
- oeis: A117265