A007403 - cp's OEIS frontend

A007403 a(n) = Sum_{m=0..n} (Sum_{k=0..m} binomial(n,k))^3 = (n+2)2^(3n-1) - 32^(n-2)nbinomial(2n,n).

n	a(n)
0	1
1	9
2	92
3	920
4	8928
5	84448
6	782464
7	7130880
8	64117760
9	570166784
10	5023524864
11	43915595776
12	381350330368
13	3292451880960
14	28283033157632
15	241884640182272
16	2060565937127424
17	17492250190544896
18	148027589475696640

[1, 9, 92, 920, 8928, 84448, 782464, 7130880, 64117760, 570166784, 5023524864, 43915595776, 381350330368, 3292451880960, 28283033157632, 241884640182272, 2060565937127424, 17492250190544896, 148027589475696640]

cp's OEIS Frontend

A007403 a(n) = Sum_{m=0..n} (Sum_{k=0..m} binomial(n,k))^3 = (n+2)2^(3n-1) - 32^(n-2)nbinomial(2n,n).

Table of values

List of values

cp's OEIS Frontend

A007403 a(n) = Sum_{m=0..n} (Sum_{k=0..m} binomial(n,k))^3 = (n+2)*2^(3*n-1) - 3*2^(n-2)*n*binomial(2*n,n).

Table of values

List of values

A007403 a(n) = Sum_{m=0..n} (Sum_{k=0..m} binomial(n,k))^3 = (n+2)2^(3n-1) - 32^(n-2)nbinomial(2n,n).