A381360 - cp's OEIS frontend

A381360 E.g.f. satisfies A(x) = exp( Integral abs(1/A(x)) dx ), where abs(F(x)) equals the series expansion formed by the unsigned coefficients in F(x).

n	a(n)
0	1
1	1
2	2
3	4
4	12
5	40
6	160
7	720
8	3680
9	20800
10	129600
11	880000
12	6476800
13	51321600
14	435776000
15	3946624000
16	37977984000
17	386949376000
18	4161608704000
19	47113228800000
20	560034421760000
21	6974121256960000
22	90796614543360000
23	1233482823823360000
24	17455222222028800000
25	256892229695692800000

[1, 1, 2, 4, 12, 40, 160, 720, 3680, 20800, 129600, 880000, 6476800, 51321600, 435776000, 3946624000, 37977984000, 386949376000, 4161608704000, 47113228800000, 560034421760000, 6974121256960000, 90796614543360000, 1233482823823360000, 17455222222028800000, 256892229695692800000]

cp's OEIS Frontend

A381360 E.g.f. satisfies A(x) = exp( Integral abs(1/A(x)) dx ), where abs(F(x)) equals the series expansion formed by the unsigned coefficients in F(x).

Table of values

List of values