A057553 - cp's OEIS frontend

A057553 Rank of (1,1,...,1) (n 1's) when {0,1,2,...}^n is lexicographically ordered.

n	a(n)
1	1
2	5
3	16
4	56
5	203
6	749
7	2795
8	10517
9	39832
10	151658
11	579956
12	2225964
13	8570330
14	33086030
15	128028650
16	496432760
17	1928418395
18	7503144365
19	29235705215
20	114064338335
21	445552419545
22	1742264571605
23	6819546853625
24	26717004445325

[1, 5, 16, 56, 203, 749, 2795, 10517, 39832, 151658, 579956, 2225964, 8570330, 33086030, 128028650, 496432760, 1928418395, 7503144365, 29235705215, 114064338335, 445552419545, 1742264571605, 6819546853625, 26717004445325]

cp's OEIS Frontend

A057553 Rank of (1,1,...,1) (n 1's) when {0,1,2,...}^n is lexicographically ordered.

Table of values

List of values