A320784 - cp's OEIS frontend

A320784 Negated inverse Euler transform of {-1 if n is a triangular number else 0, n > 0} = -A010054.

n	a(n)
0	1
1	1
2	0
3	1
4	1
5	1
6	2
7	3
8	3
9	5
10	8
11	11
12	14
13	23
14	31
15	47
16	68
17	101
18	144
19	217
20	315
21	471
22	693
23	1035
24	1528
25	2287
26	3397
27	5085
28	7587
29	11377
30	17017
31	25565
32	38349
33	57681
34	86724
35	130645
36	196778
37	296853
38	447864
39	676479
40	1022082
41	1545685
42	2338299
43	3540111
44	5361606
45	8125551

[1, 1, 0, 1, 1, 1, 2, 3, 3, 5, 8, 11, 14, 23, 31, 47, 68, 101, 144, 217, 315, 471, 693, 1035, 1528, 2287, 3397, 5085, 7587, 11377, 17017, 25565, 38349, 57681, 86724, 130645, 196778, 296853, 447864, 676479, 1022082, 1545685, 2338299, 3540111, 5361606, 8125551]

cp's OEIS Frontend

A320784 Negated inverse Euler transform of {-1 if n is a triangular number else 0, n > 0} = -A010054.

Table of values

List of values