Triangle read by rows: T(n,k) is the number of direct sum decompositions of a finite vector space of n dimensions over GF(2) that have exactly k subspaces of dimension 1, n>=0, 0<=k<=n.

A287206

Triangle read by rows: T(n,k) is the number of direct sum decompositions of a finite vector space of n dimensions over GF(2) that have exactly k subspaces of dimension 1, n>=0, 0<=k<=n.

Terms

    a(0) =1a(1) =0a(2) =1a(3) =1a(4) =0a(5) =3a(6) =1a(7) =28a(8) =0a(9) =28a(10) =281a(11) =120a(12) =1680a(13) =0a(14) =840a(15) =9921a(16) =139376a(17) =29760a(18) =277760a(19) =0a(20) =83328a(21) =16078337a(22) =20000736a(23) =140491008a(24) =19998720a(25) =139991040a(26) =0a(27) =27998208a(28) =13596908545a(29) =130684723136

External references