A113870 - cp's OEIS frontend

A113870 a(n) = a(n-1) + 2^(k(n)), where k(n) is the n-th term of the sequence formed by k(1)=0 together with the numbers A042963.

n	a(n)
1	1
2	3
3	7
4	39
5	103
6	615
7	1639
8	9831
9	26215
10	157287
11	419431
12	2516583
13	6710887
14	40265319
15	107374183
16	644245095
17	1717986919
18	10307921511
19	27487790695
20	164926744167
21	439804651111
22	2638827906663
23	7036874417767
24	42221246506599

[1, 3, 7, 39, 103, 615, 1639, 9831, 26215, 157287, 419431, 2516583, 6710887, 40265319, 107374183, 644245095, 1717986919, 10307921511, 27487790695, 164926744167, 439804651111, 2638827906663, 7036874417767, 42221246506599]

cp's OEIS Frontend

A113870 a(n) = a(n-1) + 2^(k(n)), where k(n) is the n-th term of the sequence formed by k(1)=0 together with the numbers A042963.

Table of values

List of values