a(n) = a(n-2) - (a(n-1) - a(n-2)) if (n mod 2) = 0, otherwise a(n) = a(n-1) - (a(n-3) - a(n-4)), with a(0) = 0, a(1) = 1, a(2) = -1, a(3) = 2.
A135690
a(n) = a(n-2) - (a(n-1) - a(n-2)) if (n mod 2) = 0, otherwise a(n) = a(n-1) - (a(n-3) - a(n-4)), with a(0) = 0, a(1) = 1, a(2) = -1, a(3) = 2.
Terms
- a(0) =0a(1) =1a(2) =-1a(3) =2a(4) =-4a(5) =-2a(6) =-6a(7) =0a(8) =-12a(9) =-8a(10) =-16a(11) =-4a(12) =-28a(13) =-20a(14) =-36a(15) =-12a(16) =-60a(17) =-44a(18) =-76a(19) =-28a(20) =-124a(21) =-92a(22) =-156a(23) =-60a(24) =-252a(25) =-188a(26) =-316a(27) =-124a(28) =-508a(29) =-380
External references
- oeis: A135690