Number of arrays of 8 integers in -n..n with sum zero and adjacent elements differing in absolute value.

A202968

Number of arrays of 8 integers in -n..n with sum zero and adjacent elements differing in absolute value.

Terms

    a(0) =12a(1) =1724a(2) =47732a(3) =447528a(4) =2475008a(5) =9824176a(6) =31155004a(7) =84017312a(8) =200493156a(9) =434793200a(10) =873257136a(11) =1646890444a(12) =2946873064a(13) =5043331924a(14) =8307662160a(15) =13238602092a(16) =20492707704a(17) =30919086656a(18) =45598979576a(19) =65890555856a(20) =93479027928

External references