A279101 - cp's OEIS frontend

A279101 a(n) = Sum_{k=0..n} ceiling((1 + sqrt(2))^k).

n	a(n)
0	1
1	4
2	10
3	25
4	59
5	142
6	340
7	819
8	1973
9	4760
10	11486
11	27725
12	66927
13	161570
14	390056
15	941671
16	2273385
17	5488428
18	13250226
19	31988865
20	77227939
21	186444726
22	450117372
23	1086679451
24	2623476253
25	6333631936
26	15290740102
27	36915112117
28	89120964311
29	215157040714
30	519435045712
31	1254027132111
32	3027489309905
33	7309005751892

[1, 4, 10, 25, 59, 142, 340, 819, 1973, 4760, 11486, 27725, 66927, 161570, 390056, 941671, 2273385, 5488428, 13250226, 31988865, 77227939, 186444726, 450117372, 1086679451, 2623476253, 6333631936, 15290740102, 36915112117, 89120964311, 215157040714, 519435045712, 1254027132111, 3027489309905, 7309005751892]

cp's OEIS Frontend

A279101 a(n) = Sum_{k=0..n} ceiling((1 + sqrt(2))^k).

Table of values

List of values