A038199 - cp's OEIS frontend

A038199 Row sums of triangle T(m,n) = number of solutions to 1 <= a(1) < a(2) < ... < a(m) <= n, where gcd(a(1), a(2), ..., a(m), n) = 1, in A020921.

n	a(n)
1	1
2	2
3	6
4	12
5	30
6	54
7	126
8	240
9	504
10	990
11	2046
12	4020
13	8190
14	16254
15	32730
16	65280
17	131070
18	261576
19	524286
20	1047540
21	2097018
22	4192254
23	8388606
24	16772880
25	33554400
26	67100670
27	134217216
28	268419060
29	536870910
30	1073708010
31	2147483646

[1, 2, 6, 12, 30, 54, 126, 240, 504, 990, 2046, 4020, 8190, 16254, 32730, 65280, 131070, 261576, 524286, 1047540, 2097018, 4192254, 8388606, 16772880, 33554400, 67100670, 134217216, 268419060, 536870910, 1073708010, 2147483646]

cp's OEIS Frontend

A038199 Row sums of triangle T(m,n) = number of solutions to 1 <= a(1) < a(2) < ... < a(m) <= n, where gcd(a(1), a(2), ..., a(m), n) = 1, in A020921.

Table of values

List of values