Original entry on oeis.org
1, 1, 6, 12, 147, 441, 8112, 32448, 796005, 3980025, 122054688, 732328128, 26950548807, 188653841649, 8099902347264, 64799218778112, 3179644775178921, 28616802976610289, 1579734079664832000, 15797340796648320000
Offset: 1
-
f[j_] := Floor[j/2]; z = 20;
u := Product[f[j]^2 - f[j] f[k] + f[k]^2, {j, 1, k - 1}]
v[n_] := Product[u, {k, 2, n}]
Table[v[n], {n, 1, z}] (* A203752 *)
Table[v[n + 1]/v[n], {n, 1, z}] (* A203753 *)
Table[Sqrt[v[n + 1]/v[n]], {n, 1, z}] (* A203754 *)
A203752
Vandermonde sequence using x^2 - xy + y^2 applied to (0,1,1,2,2,...,floor(n/2)).
Original entry on oeis.org
1, 1, 1, 36, 5184, 112021056, 21785966991936, 1433615623503400157184, 1509414758014670876688343105536, 956401356293432867934306416285626820198400, 15149970368698147242050701825966625432586471604224000000
Offset: 1
-
f[j_] := Floor[j/2]; z = 20;
u := Product[f[j]^2 - f[j] f[k] + f[k]^2, {j, 1, k - 1}]
v[n_] := Product[u, {k, 2, n}]
Table[v[n], {n, 1, z}] (* A203752 *)
Table[v[n + 1]/v[n], {n, 1, z}] (* A203753 *)
Table[Sqrt[v[n + 1]/v[n]], {n, 1, z}] (* A203754 *)
Showing 1-2 of 2 results.
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