A100515 - cp's OEIS frontend

A100515 Denominator of Sum_{k=0..n} 1/C(3n, 3k).

n	a(n)
0	1
1	1
2	20
3	42
4	4620
5	5005
6	2042040
7	1763580
8	59491432
9	95611230
10	776363187600
11	235953517800
12	24067258815600
13	143627189706
14	12170010541088400
15	34128942604356600
16	245138783756209200
17	1103648327722933300
18	497725329469811592240
19	94396183175309095080
20	538372898043179538939600

[1, 1, 20, 42, 4620, 5005, 2042040, 1763580, 59491432, 95611230, 776363187600, 235953517800, 24067258815600, 143627189706, 12170010541088400, 34128942604356600, 245138783756209200, 1103648327722933300, 497725329469811592240, 94396183175309095080, 538372898043179538939600]

cp's OEIS Frontend

A100515 Denominator of Sum_{k=0..n} 1/C(3n, 3k).

Table of values

List of values

cp's OEIS Frontend

A100515 Denominator of Sum_{k=0..n} 1/C(3*n, 3*k).

Table of values

List of values

A100515 Denominator of Sum_{k=0..n} 1/C(3n, 3k).