A118182 - cp's OEIS frontend

A118182 Antidiagonal sums of triangle A118180: a(n) = Sum_{k=0..[n/2]} (3^k)^(n-2*k) for n>=0.

n	a(n)
0	1
1	1
2	2
3	4
4	11
5	37
6	164
7	1000
8	8021
9	81001
10	1076006
11	19683244
12	473632031
13	14349084877
14	571833704648
15	31381448626000
16	2265367321680041
17	205893684435186001
18	24615565942378859210
19	4052605390737766057684

[1, 1, 2, 4, 11, 37, 164, 1000, 8021, 81001, 1076006, 19683244, 473632031, 14349084877, 571833704648, 31381448626000, 2265367321680041, 205893684435186001, 24615565942378859210, 4052605390737766057684]

cp's OEIS Frontend

A118182 Antidiagonal sums of triangle A118180: a(n) = Sum_{k=0..[n/2]} (3^k)^(n-2*k) for n>=0.

Table of values

List of values