Number of arrangements of n+1 numbers x(i) in -3..3 with the sum of x(i)*x(i+1) equal to zero.
A188352
Number of arrangements of n+1 numbers x(i) in -3..3 with the sum of x(i)*x(i+1) equal to zero.
Terms
- a(0) =13a(1) =91a(2) =257a(3) =1775a(4) =7369a(5) =49747a(6) =262925a(7) =1763151a(8) =10536621a(9) =70819767a(10) =449413269a(11) =3032790187a(12) =19849674769a(13) =134432007295a(14) =895147297233
External references
- oeis: A188352