A105558 - cp's OEIS frontend

A105558 Central terms in even-indexed rows of triangle A105556 and thus equals the n-th row sum of the n-th matrix power of the Narayana triangle A001263.

n	a(n)
0	1
1	2
2	12
3	148
4	3105
5	99156
6	4481449
7	272312216
8	21414443481
9	2116193061340
10	256712977920256
11	37506637787774112
12	6496315164318118165
13	1316230822119433518312
14	308426950979497974254310

[1, 2, 12, 148, 3105, 99156, 4481449, 272312216, 21414443481, 2116193061340, 256712977920256, 37506637787774112, 6496315164318118165, 1316230822119433518312, 308426950979497974254310]

cp's OEIS Frontend

A105558 Central terms in even-indexed rows of triangle A105556 and thus equals the n-th row sum of the n-th matrix power of the Narayana triangle A001263.

Table of values

List of values