A140961 - cp's OEIS frontend

A140961 Number of 3 X n {0,1}-matrices such that: (a) first and second row have a common 1, (b) second and third row have a common 1.

n	a(n)
1	1
2	17
3	205
4	2129
5	20341
6	184457
7	1615405
8	13808609
9	116015461
10	962575097
11	7913168605
12	64610052689
13	524855128981
14	4247421698537
15	34274519697805
16	275985344786369
17	2218709434248901
18	17815093293410777
19	142915542082163005
20	1145704555158361649
21	9179974972732223221

[1, 17, 205, 2129, 20341, 184457, 1615405, 13808609, 116015461, 962575097, 7913168605, 64610052689, 524855128981, 4247421698537, 34274519697805, 275985344786369, 2218709434248901, 17815093293410777, 142915542082163005, 1145704555158361649, 9179974972732223221]

cp's OEIS Frontend

A140961 Number of 3 X n {0,1}-matrices such that: (a) first and second row have a common 1, (b) second and third row have a common 1.

Table of values

List of values