Number of arrays of 2n nondecreasing integers in -5..5 with sum zero and equal numbers greater than zero and less than zero.
A203288
Number of arrays of 2n nondecreasing integers in -5..5 with sum zero and equal numbers greater than zero and less than zero.
Terms
- a(0) =6a(1) =35a(2) =154a(3) =544a(4) =1614a(5) =4206a(6) =9880a(7) =21363a(8) =43136a(9) =82267a(10) =149456a(11) =260438a(12) =437670a(13) =712512a(14) =1127794a(15) =1741011a(16) =2628022a(17) =3887553a(18) =5646312a(19) =8065104a(20) =11345704a(21) =15738920a(22) =21553576a(23) =29166921a(24) =39036102a(25) =51711323a(26) =67850258a(27) =88234392
External references
- oeis: A203288