A051937 - cp's OEIS frontend

A051937 Truncated triangular pyramid numbers: a(n) = Sum_{k=4..n} (k*(k+1)/2 - 9).

n	a(n)
4	1
5	7
6	19
7	38
8	65
9	101
10	147
11	204
12	273
13	355
14	451
15	562
16	689
17	833
18	995
19	1176
20	1377
21	1599
22	1843
23	2110
24	2401
25	2717
26	3059
27	3428
28	3825
29	4251
30	4707
31	5194
32	5713
33	6265
34	6851
35	7472
36	8129
37	8823
38	9555
39	10326
40	11137
41	11989
42	12883
43	13820
44	14801
45	15827
46	16899
47	18018

[1, 7, 19, 38, 65, 101, 147, 204, 273, 355, 451, 562, 689, 833, 995, 1176, 1377, 1599, 1843, 2110, 2401, 2717, 3059, 3428, 3825, 4251, 4707, 5194, 5713, 6265, 6851, 7472, 8129, 8823, 9555, 10326, 11137, 11989, 12883, 13820, 14801, 15827, 16899, 18018]

cp's OEIS Frontend

A051937 Truncated triangular pyramid numbers: a(n) = Sum_{k=4..n} (k*(k+1)/2 - 9).

Table of values

List of values