A103972 - cp's OEIS frontend

A103972 Expansion of (1-sqrt(1-4x-20x^2))/(2*x).

n	a(n)
0	1
1	6
2	12
3	60
4	264
5	1392
6	7392
7	41424
8	236640
9	1384512
10	8224896
11	49554816
12	301884672
13	1856878080
14	11514915840
15	71915838720
16	451938731520
17	2855705994240
18	18132621772800
19	115637702461440
20	740356410961920
21	4756888756101120
22	30662391191715840
23	198229520200704000
24	1285001080928845824

[1, 6, 12, 60, 264, 1392, 7392, 41424, 236640, 1384512, 8224896, 49554816, 301884672, 1856878080, 11514915840, 71915838720, 451938731520, 2855705994240, 18132621772800, 115637702461440, 740356410961920, 4756888756101120, 30662391191715840, 198229520200704000, 1285001080928845824]

cp's OEIS Frontend

A103972 Expansion of (1-sqrt(1-4x-20x^2))/(2*x).

Table of values

List of values

cp's OEIS Frontend

A103972 Expansion of (1-sqrt(1-4*x-20*x^2))/(2*x).

Table of values

List of values

A103972 Expansion of (1-sqrt(1-4x-20x^2))/(2*x).