A381669 - cp's OEIS frontend

A381669 The function A(x) = x+(1/2)x^2-(1/16)x^4... = Sum_{k >= 0} x^ka(k)/A381670(k) satisfies the functional equation: x(A(x)+1) = A(A(x)).

n	a(n)
0	0
1	1
2	1
3	0
4	-1
5	1
6	-1
7	-1
8	113
9	-19
10	-1049
11	849
12	10171
13	-67975
14	183735
15	143679
16	-81627111
17	-135422127
18	3045667427
19	341639611
20	-225862086367
21	212228801943
22	8911194501081
23	-5123304557653
24	-1496818714531027
25	6387545555294289
26	64005829810291411
27	-250179519280324047

[0, 1, 1, 0, -1, 1, -1, -1, 113, -19, -1049, 849, 10171, -67975, 183735, 143679, -81627111, -135422127, 3045667427, 341639611, -225862086367, 212228801943, 8911194501081, -5123304557653, -1496818714531027, 6387545555294289, 64005829810291411, -250179519280324047]

cp's OEIS Frontend

A381669 The function A(x) = x+(1/2)x^2-(1/16)x^4... = Sum_{k >= 0} x^ka(k)/A381670(k) satisfies the functional equation: x(A(x)+1) = A(A(x)).

Table of values

List of values

cp's OEIS Frontend

A381669 The function A(x) = x+(1/2)*x^2-(1/16)*x^4... = Sum_{k >= 0} x^k*a(k)/A381670(k) satisfies the functional equation: x*(A(x)+1) = A(A(x)).

Table of values

List of values

A381669 The function A(x) = x+(1/2)x^2-(1/16)x^4... = Sum_{k >= 0} x^ka(k)/A381670(k) satisfies the functional equation: x(A(x)+1) = A(A(x)).