A120898 - cp's OEIS frontend

A120898 Cascadence of 1+2x+x^2; a triangle, read by rows of 2n+1 terms, that retains its original form upon convolving each row with [1,2,1] and then letting excess terms spill over from each row into the initial positions of the next row such that only 2n+1 terms remain in row n for n>=0.

n	a(n)
0	1
1	2
2	1
3	2
4	5
5	6
6	5
7	2
8	5
9	16
10	22
11	18
12	14
13	12
14	5
15	16
16	54
17	78
18	72
19	58
20	43
21	38
22	37
23	16
24	54
25	186
26	282
27	280
28	231
29	182
30	156
31	128
32	123
33	124
34	54
35	186
36	654
37	1030
38	1073
39	924
40	751
41	622
42	535
43	498
44	425
45	418
46	426
47	186
48	654
49	2338
50	3787
51	4100
52	3672
53	3048
54	2530
55	2190
56	1956
57	1766

[1, 2, 1, 2, 5, 6, 5, 2, 5, 16, 22, 18, 14, 12, 5, 16, 54, 78, 72, 58, 43, 38, 37, 16, 54, 186, 282, 280, 231, 182, 156, 128, 123, 124, 54, 186, 654, 1030, 1073, 924, 751, 622, 535, 498, 425, 418, 426, 186, 654, 2338, 3787, 4100, 3672, 3048, 2530, 2190, 1956, 1766]

cp's OEIS Frontend

A120898 Cascadence of 1+2x+x^2; a triangle, read by rows of 2n+1 terms, that retains its original form upon convolving each row with [1,2,1] and then letting excess terms spill over from each row into the initial positions of the next row such that only 2n+1 terms remain in row n for n>=0.

Table of values

List of values