A266936 - cp's OEIS frontend

A266936 Number of 3 X n binary arrays with rows lexicographically nondecreasing and columns lexicographically nondecreasing and row sums nondecreasing and column sums nonincreasing.

n	a(n)
1	4
2	7
3	9
4	12
5	14
6	19
7	21
8	26
9	30
10	35
11	39
12	46
13	50
14	57
15	63
16	70
17	76
18	85
19	91
20	100
21	108
22	117
23	125
24	136
25	144
26	155
27	165
28	176
29	186
30	199
31	209
32	222
33	234
34	247
35	259
36	274
37	286
38	301
39	315
40	330
41	344
42	361
43	375
44	392
45	408
46	425
47	441
48	460
49	476
50	495
51	513
52	532
53	550
54	571
55	589
56	610
57	630
58	651
59	671

[4, 7, 9, 12, 14, 19, 21, 26, 30, 35, 39, 46, 50, 57, 63, 70, 76, 85, 91, 100, 108, 117, 125, 136, 144, 155, 165, 176, 186, 199, 209, 222, 234, 247, 259, 274, 286, 301, 315, 330, 344, 361, 375, 392, 408, 425, 441, 460, 476, 495, 513, 532, 550, 571, 589, 610, 630, 651, 671]

cp's OEIS Frontend

A266936 Number of 3 X n binary arrays with rows lexicographically nondecreasing and columns lexicographically nondecreasing and row sums nondecreasing and column sums nonincreasing.

Table of values

List of values

n	a(n)
1	4
2	7
3	9
4	12
5	14
6	19
7	21
8	26
9	30
10	35
11	39
12	46
13	50
14	57
15	63
16	70
17	76
18	85
19	91
20	100
21	108
22	117
23	125
24	136
25	144
26	155
27	165
28	176
29	186
30	199
31	209
32	222
33	234
34	247
35	259
36	274
37	286
38	301
39	315
40	330
41	344
42	361
43	375
44	392
45	408
46	425
47	441
48	460
49	476
50	495
51	513
52	532
53	550
54	571
55	589
56	610
57	630
58	651
59	671

n	a(n)
1	4
2	7
3	9
4	12
5	14
6	19
7	21
8	26
9	30
10	35
11	39
12	46
13	50
14	57
15	63
16	70
17	76
18	85
19	91
20	100
21	108
22	117
23	125
24	136
25	144
26	155
27	165
28	176
29	186
30	199
31	209
32	222
33	234
34	247
35	259
36	274
37	286
38	301
39	315
40	330
41	344
42	361
43	375
44	392
45	408
46	425
47	441
48	460
49	476
50	495
51	513
52	532
53	550
54	571
55	589
56	610
57	630
58	651
59	671

n	a(n)
1	4
2	7
3	9
4	12
5	14
6	19
7	21
8	26
9	30
10	35
11	39
12	46
13	50
14	57
15	63
16	70
17	76
18	85
19	91
20	100
21	108
22	117
23	125
24	136
25	144
26	155
27	165
28	176
29	186
30	199
31	209
32	222
33	234
34	247
35	259
36	274
37	286
38	301
39	315
40	330
41	344
42	361
43	375
44	392
45	408
46	425
47	441
48	460
49	476
50	495
51	513
52	532
53	550
54	571
55	589
56	610
57	630
58	651
59	671