1/4 the number of arrangements of 8 nonzero numbers x(i) in -n..n with the sum of sign(x(i))*(|x(i)| mod x(i+1)) equal to zero.
A189957
1/4 the number of arrangements of 8 nonzero numbers x(i) in -n..n with the sum of sign(x(i))*(|x(i)| mod x(i+1)) equal to zero.
Terms
- a(0) =64a(1) =4632a(2) =72744a(3) =542353a(4) =2514945a(5) =9133420a(6) =26586582a(7) =68081570a(8) =154928607a(9) =325585559a(10) =631690148a(11) =1167609345a(12) =2043508680a(13) =3435508142a(14) =5566095860a(15) =8767568010a(16) =13387924849a(17) =20010820026a(18) =29195103851a(19) =41845814529a(20) =58906853906
External references
- oeis: A189957