Square array A(n,k) = A388979(A388981(n, k)), read by descending antidiagonals.

Terms

a(0) =520a(1) =1368a(2) =4704a(3) =952a(4) =11040a(5) =34848a(6) =1848a(7) =8976a(8) =77280a(9) =209040a(10) =3016a(11) =14352a(12) =53664a(13) =388080a(14) =788256a(15) =29200a(16) =21216a(17) =78336a(18) =301920a(19) =1220544a(20) =2210688a(21) =5904a(22) =1380288a(23) =105792a(24) =401280a(25) =1021440a(26) =3231360a(27) =5216400a(28) =4488a(29) =46800