1/4 the number of arrangements of n+1 nonzero numbers x(i) in -2..2 with the sum of sign(x(i))*(|x(i)| mod x(i+1)) equal to zero.
A189944
1/4 the number of arrangements of n+1 nonzero numbers x(i) in -2..2 with the sum of sign(x(i))*(|x(i)| mod x(i+1)) equal to zero.
Terms
- a(0) =3a(1) =8a(2) =22a(3) =72a(4) =280a(5) =1152a(6) =4632a(7) =17888a(8) =67232a(9) =251136a(10) =947136a(11) =3625216a(12) =14033664a(13) =54599680a(14) =212521344a(15) =826308096a(16) =3211280896a(17) =12490338304a(18) =48666153984a(19) =189986959360a(20) =742894424064
External references
- oeis: A189944