A182754 - cp's OEIS frontend

A182754 a(1) = 1, a(2) = 21, a(n) = 77*a(n-2) for n>=3.

n	a(n)
1	1
2	21
3	77
4	1617
5	5929
6	124509
7	456533
8	9587193
9	35153041
10	738213861
11	2706784157
12	56842467297
13	208422380089
14	4376869981869
15	16048523266853
16	337018988603913
17	1235736291547681
18	25950462122501301
19	95151694449171437
20	1998185583432600177
21	7326680472586200649

[1, 21, 77, 1617, 5929, 124509, 456533, 9587193, 35153041, 738213861, 2706784157, 56842467297, 208422380089, 4376869981869, 16048523266853, 337018988603913, 1235736291547681, 25950462122501301, 95151694449171437, 1998185583432600177, 7326680472586200649]

cp's OEIS Frontend

A182754 a(1) = 1, a(2) = 21, a(n) = 77*a(n-2) for n>=3.

Table of values

List of values