A375393 - cp's OEIS frontend

A375393 a(0) = 1; a(n) = Sum_{k=0..n-1} (4k+3) a(k) * a(n-k-1).

n	a(n)
0	1
1	3
2	30
3	483
4	10314
5	268686
6	8167068
7	281975715
8	10863651474
9	461227101210
10	21377716429860
11	1073816307452430
12	58106804389870500
13	3370330005649001532
14	208635817503306332088
15	13731856676157543219747
16	957698874584753026878306
17	70562301536089812703526370
18	5477354759932929856218644820

[1, 3, 30, 483, 10314, 268686, 8167068, 281975715, 10863651474, 461227101210, 21377716429860, 1073816307452430, 58106804389870500, 3370330005649001532, 208635817503306332088, 13731856676157543219747, 957698874584753026878306, 70562301536089812703526370, 5477354759932929856218644820]

cp's OEIS Frontend

A375393 a(0) = 1; a(n) = Sum_{k=0..n-1} (4k+3) a(k) * a(n-k-1).

Table of values

List of values

cp's OEIS Frontend

A375393 a(0) = 1; a(n) = Sum_{k=0..n-1} (4*k+3) * a(k) * a(n-k-1).

Table of values

List of values

A375393 a(0) = 1; a(n) = Sum_{k=0..n-1} (4k+3) a(k) * a(n-k-1).