A372265 - cp's OEIS frontend

A372265 a(n) = floor((2n - 3 + sqrt(1 + 4n!))/2).

n	a(n)
1	0
2	2
3	4
4	7
5	14
6	31
7	76
8	207
9	609
10	1913
11	6327
12	21896
13	78922
14	295272
15	1143549
16	4574158
17	18859692
18	80014850
19	348776594
20	1559776287
21	7147792837
22	33526120102
23	160785623566
24	787685471345
25	3938427356638
26	20082117944270
27	104349745809099
28	552166953567254
29	2973510046012938
30	16286585271694984

[0, 2, 4, 7, 14, 31, 76, 207, 609, 1913, 6327, 21896, 78922, 295272, 1143549, 4574158, 18859692, 80014850, 348776594, 1559776287, 7147792837, 33526120102, 160785623566, 787685471345, 3938427356638, 20082117944270, 104349745809099, 552166953567254, 2973510046012938, 16286585271694984]

cp's OEIS Frontend

A372265 a(n) = floor((2n - 3 + sqrt(1 + 4n!))/2).

Table of values

List of values

cp's OEIS Frontend

A372265 a(n) = floor((2*n - 3 + sqrt(1 + 4*n!))/2).

Table of values

List of values

A372265 a(n) = floor((2n - 3 + sqrt(1 + 4n!))/2).