Number of (w,x,y,z) with all terms in {1,...,n} and median<=mean.

Terms

a(0) =0a(1) =1a(2) =12a(3) =57a(4) =172a(5) =405a(6) =816a(7) =1477a(8) =2472a(9) =3897a(10) =5860a(11) =8481a(12) =11892a(13) =16237a(14) =21672a(15) =28365a(16) =36496a(17) =46257a(18) =57852a(19) =71497a(20) =87420a(21) =105861a(22) =127072a(23) =151317a(24) =178872a(25) =210025a(26) =245076a(27) =284337a(28) =328132a(29) =376797