A357673 - cp's OEIS frontend

A357673 a(n) = 4Sum_{k = 0..2n} binomial(n+k-1,k) + 3Sum_{k = 0..2n} binomial(n+k-1,k)^2.

n	a(n)
0	7
1	21
2	225
3	5124
4	162657
5	5812521
6	219004812
7	8516056500
8	338508840801
9	13679415485805
10	559978704877725
11	23162632151271480
12	966309241173439500
13	40602415885424806824
14	1716435895297948558812
15	72941388509291664563124
16	3113826813351114598588257
17	133458673478315967012049245

[7, 21, 225, 5124, 162657, 5812521, 219004812, 8516056500, 338508840801, 13679415485805, 559978704877725, 23162632151271480, 966309241173439500, 40602415885424806824, 1716435895297948558812, 72941388509291664563124, 3113826813351114598588257, 133458673478315967012049245]

cp's OEIS Frontend

A357673 a(n) = 4Sum_{k = 0..2n} binomial(n+k-1,k) + 3Sum_{k = 0..2n} binomial(n+k-1,k)^2.

Table of values

List of values

cp's OEIS Frontend

A357673 a(n) = 4*Sum_{k = 0..2*n} binomial(n+k-1,k) + 3*Sum_{k = 0..2*n} binomial(n+k-1,k)^2.

Table of values

List of values

A357673 a(n) = 4Sum_{k = 0..2n} binomial(n+k-1,k) + 3Sum_{k = 0..2n} binomial(n+k-1,k)^2.