A060404 - cp's OEIS frontend

A060404 G.f.: Sum_{k >= 1} (phi(k)/k)log(1-f(x^k)), where f(x) = (1 - sqrt(1 - 4x)) / (2*x) - 1 is the g.f. for the Catalan numbers (A000108) C_1, C_2, C_3, ...

n	a(n)
0	0
1	1
2	3
3	8
4	25
5	78
6	270
7	926
8	3305
9	11868
10	43232
11	158586
12	586530
13	2181088
14	8154710
15	30620868
16	115435625
17	436654794
18	1656793374
19	6303490610
20	24041649128
21	91899730068
22	352002058402
23	1350767683698
24	5192237233602
25	19989786008160

[0, 1, 3, 8, 25, 78, 270, 926, 3305, 11868, 43232, 158586, 586530, 2181088, 8154710, 30620868, 115435625, 436654794, 1656793374, 6303490610, 24041649128, 91899730068, 352002058402, 1350767683698, 5192237233602, 19989786008160]

cp's OEIS Frontend

A060404 G.f.: Sum_{k >= 1} (phi(k)/k)log(1-f(x^k)), where f(x) = (1 - sqrt(1 - 4x)) / (2*x) - 1 is the g.f. for the Catalan numbers (A000108) C_1, C_2, C_3, ...

Table of values

List of values

cp's OEIS Frontend

A060404 G.f.: Sum_{k >= 1} (phi(k)/k)*log(1-f(x^k)), where f(x) = (1 - sqrt(1 - 4*x)) / (2*x) - 1 is the g.f. for the Catalan numbers (A000108) C_1, C_2, C_3, ...

Table of values

List of values

A060404 G.f.: Sum_{k >= 1} (phi(k)/k)log(1-f(x^k)), where f(x) = (1 - sqrt(1 - 4x)) / (2*x) - 1 is the g.f. for the Catalan numbers (A000108) C_1, C_2, C_3, ...