A386830 - cp's OEIS frontend

A386830 a(n) = Sum_{k=0..n} 3^k * 2^(n-k) * binomial(3n+1,k) binomial(3*n-k,n-k).

n	a(n)
0	1
1	18
2	459
3	12942
4	382671
5	11632248
6	360048924
7	11287595862
8	357239123631
9	11389281564978
10	365227235524539
11	11767662196724232
12	380651590433357316
13	12354006908520865008
14	402088229127633026304
15	13119017347331737771302
16	428955765661154879370351

[1, 18, 459, 12942, 382671, 11632248, 360048924, 11287595862, 357239123631, 11389281564978, 365227235524539, 11767662196724232, 380651590433357316, 12354006908520865008, 402088229127633026304, 13119017347331737771302, 428955765661154879370351]

cp's OEIS Frontend

A386830 a(n) = Sum_{k=0..n} 3^k * 2^(n-k) * binomial(3n+1,k) binomial(3*n-k,n-k).

Table of values

List of values

cp's OEIS Frontend

A386830 a(n) = Sum_{k=0..n} 3^k * 2^(n-k) * binomial(3*n+1,k) * binomial(3*n-k,n-k).

Table of values

List of values

A386830 a(n) = Sum_{k=0..n} 3^k * 2^(n-k) * binomial(3n+1,k) binomial(3*n-k,n-k).