A019298 - cp's OEIS frontend

A019298 Number of balls in pyramid with base either a regular hexagon or a hexagon with alternate sides differing by 1 (balls in hexagonal pyramid of height n taken from hexagonal close-packing).

n	a(n)
0	0
1	1
2	4
3	11
4	23
5	42
6	69
7	106
8	154
9	215
10	290
11	381
12	489
13	616
14	763
15	932
16	1124
17	1341
18	1584
19	1855
20	2155
21	2486
22	2849
23	3246
24	3678
25	4147
26	4654
27	5201
28	5789
29	6420
30	7095
31	7816
32	8584
33	9401
34	10268
35	11187
36	12159
37	13186

[0, 1, 4, 11, 23, 42, 69, 106, 154, 215, 290, 381, 489, 616, 763, 932, 1124, 1341, 1584, 1855, 2155, 2486, 2849, 3246, 3678, 4147, 4654, 5201, 5789, 6420, 7095, 7816, 8584, 9401, 10268, 11187, 12159, 13186]

cp's OEIS Frontend

A019298 Number of balls in pyramid with base either a regular hexagon or a hexagon with alternate sides differing by 1 (balls in hexagonal pyramid of height n taken from hexagonal close-packing).

Table of values

List of values