Number of arrays of 6 nondecreasing integers in -n..n with sum zero and equal numbers greater than zero and less than zero.

A203293

Number of arrays of 6 nondecreasing integers in -n..n with sum zero and equal numbers greater than zero and less than zero.

Terms

    a(0) =4a(1) =10a(2) =28a(3) =69a(4) =154a(5) =310a(6) =580a(7) =1013a(8) =1680a(9) =2662a(10) =4064a(11) =6005a(12) =8634a(13) =12114a(14) =16644a(15) =22441a(16) =29760a(17) =38878a(18) =50116a(19) =63817a(20) =80374a(21) =100206a(22) =123784a(23) =151609a(24) =184240a(25) =222266a(26) =266340a(27) =317149a(28) =375446a(29) =442022

External references