A204061 - cp's OEIS frontend

A204061 G.f.: exp( Sum_{n>=1} A001333(n)^2 * x^n/n ) where A001333(n) = A002203(n)/2, one-half the companion Pell numbers.

n	a(n)
0	1
1	1
2	5
3	21
4	101
5	501
6	2561
7	13345
8	70561
9	377281
10	2035285
11	11059205
12	60454005
13	332138405
14	1832677185
15	10150115201
16	56398558081
17	314273655745
18	1755700634981
19	9830544087221
20	55155558312901
21	310027473436821
22	1745567243959105
23	9843160519978401
24	55582528404717601

[1, 1, 5, 21, 101, 501, 2561, 13345, 70561, 377281, 2035285, 11059205, 60454005, 332138405, 1832677185, 10150115201, 56398558081, 314273655745, 1755700634981, 9830544087221, 55155558312901, 310027473436821, 1745567243959105, 9843160519978401, 55582528404717601]

cp's OEIS Frontend

A204061 G.f.: exp( Sum_{n>=1} A001333(n)^2 * x^n/n ) where A001333(n) = A002203(n)/2, one-half the companion Pell numbers.

Table of values

List of values