A169686 - cp's OEIS frontend

A169686 a(n) = sqrt(T(k-1)T(k)T(k+1)) as k runs through the terms of A072221 and T(i)=i*(i+1)/2.

n	a(n)
1	0
2	30
3	5850
4	1157730
5	229221540
6	45384688830
7	8985939059790
8	1779170548525890
9	352266782665431240
10	69747043797185672190
11	13809562405059974172930
12	2734223609158076980818690
13	541362465050894178032921580
14	107187033856467889149087366750
15	21222491341115591157198758976630

[0, 30, 5850, 1157730, 229221540, 45384688830, 8985939059790, 1779170548525890, 352266782665431240, 69747043797185672190, 13809562405059974172930, 2734223609158076980818690, 541362465050894178032921580, 107187033856467889149087366750, 21222491341115591157198758976630]

cp's OEIS Frontend

A169686 a(n) = sqrt(T(k-1)T(k)T(k+1)) as k runs through the terms of A072221 and T(i)=i*(i+1)/2.

Table of values

List of values

cp's OEIS Frontend

A169686 a(n) = sqrt(T(k-1)*T(k)*T(k+1)) as k runs through the terms of A072221 and T(i)=i*(i+1)/2.

Table of values

List of values

A169686 a(n) = sqrt(T(k-1)T(k)T(k+1)) as k runs through the terms of A072221 and T(i)=i*(i+1)/2.