A051938 - cp's OEIS frontend

A051938 Truncated triangular numbers: a(n) = n*(n+1)/2 - 18.

n	a(n)
6	3
7	10
8	18
9	27
10	37
11	48
12	60
13	73
14	87
15	102
16	118
17	135
18	153
19	172
20	192
21	213
22	235
23	258
24	282
25	307
26	333
27	360
28	388
29	417
30	447
31	478
32	510
33	543
34	577
35	612
36	648
37	685
38	723
39	762
40	802
41	843
42	885
43	928
44	972
45	1017
46	1063
47	1110
48	1158
49	1207
50	1257
51	1308
52	1360
53	1413
54	1467
55	1522
56	1578

[3, 10, 18, 27, 37, 48, 60, 73, 87, 102, 118, 135, 153, 172, 192, 213, 235, 258, 282, 307, 333, 360, 388, 417, 447, 478, 510, 543, 577, 612, 648, 685, 723, 762, 802, 843, 885, 928, 972, 1017, 1063, 1110, 1158, 1207, 1257, 1308, 1360, 1413, 1467, 1522, 1578]

cp's OEIS Frontend

A051938 Truncated triangular numbers: a(n) = n*(n+1)/2 - 18.

Table of values

List of values