1,2
Each term divides its successor, as in A203310.
Table of n, a(n) for n=1..10.
f[j_] := j (j + 1)/2; z = 15;
v[n_] := Product[Product[f[k] - f[j], {j, 1, k - 1}], {k, 2, n}]
Table[v[n], {n, 1, z}] (* A203309 *)
Table[v[n + 1]/v[n], {n, 1, z - 1}] (* A203310 *)
Cf. A203310.
Sequence in context: A000187 A053851 A077521 * A090600 A113511 A062008
Adjacent sequences: A203306 A203307 A203308 * A203310 A203311 A203312
nonn
Clark Kimberling, Jan 01 2012
approved
