A273464 - cp's OEIS frontend

A273464 The number of tilings of an equilateral triangle of side length n with k lozenges and n^2 - 2k unit triangles. Triangle T(n, k) with n >= 1 and 0 <= k <= n(n + 1)/2, read by rows.

n	a(n)
1	1
2	1
3	3
4	1
5	9
6	24
7	18
8	1
9	18
10	126
11	434
12	762
13	630
14	187
15	1
16	30
17	387
18	2814
19	12699
20	36894
21	69242
22	81936
23	57672
24	21432
25	3135
26	1
27	45
28	915
29	11127
30	90270
31	515970
32	2139120
33	6523428
34	14683401
35	24256853
36	28975770
37	24383838
38	13860321
39	4966929
40	989970
41	81462
42	1
43	63

[1, 1, 3, 1, 9, 24, 18, 1, 18, 126, 434, 762, 630, 187, 1, 30, 387, 2814, 12699, 36894, 69242, 81936, 57672, 21432, 3135, 1, 45, 915, 11127, 90270, 515970, 2139120, 6523428, 14683401, 24256853, 28975770, 24383838, 13860321, 4966929, 989970, 81462, 1, 63]

cp's OEIS Frontend

A273464 The number of tilings of an equilateral triangle of side length n with k lozenges and n^2 - 2k unit triangles. Triangle T(n, k) with n >= 1 and 0 <= k <= n(n + 1)/2, read by rows.

Table of values

List of values

cp's OEIS Frontend

A273464 The number of tilings of an equilateral triangle of side length n with k lozenges and n^2 - 2*k unit triangles. Triangle T(n, k) with n >= 1 and 0 <= k <= n*(n + 1)/2, read by rows.

Table of values

List of values

A273464 The number of tilings of an equilateral triangle of side length n with k lozenges and n^2 - 2k unit triangles. Triangle T(n, k) with n >= 1 and 0 <= k <= n(n + 1)/2, read by rows.