A331809 - cp's OEIS frontend

A331809 a(1) = 1; a(2) = 2; thereafter a(n) is the smallest number > a(n-1) which is neither of the form 2a(i) nor Sum_{j=1..n-1} ( b_ja(j) ) where 0 < i < n, b_j = 1 or 0.

n	a(n)
1	1
2	2
3	5
4	9
5	13
6	31
7	35
8	92
9	118
10	280
11	350
12	866
13	1102
14	2668
15	3368
16	8240
17	10444
18	25420
19	32156
20	78464
21	99352
22	242128
23	306440
24	747272
25	945976
26	2306128
27	2919008
28	7117088
29	9009040
30	21964144
31	27802160
32	67784384
33	85802464
34	209191168
35	264795488
36	645591584
37	817196512
38	1992379072

[1, 2, 5, 9, 13, 31, 35, 92, 118, 280, 350, 866, 1102, 2668, 3368, 8240, 10444, 25420, 32156, 78464, 99352, 242128, 306440, 747272, 945976, 2306128, 2919008, 7117088, 9009040, 21964144, 27802160, 67784384, 85802464, 209191168, 264795488, 645591584, 817196512, 1992379072]

cp's OEIS Frontend

A331809 a(1) = 1; a(2) = 2; thereafter a(n) is the smallest number > a(n-1) which is neither of the form 2a(i) nor Sum_{j=1..n-1} ( b_ja(j) ) where 0 < i < n, b_j = 1 or 0.

Table of values

List of values

cp's OEIS Frontend

A331809 a(1) = 1; a(2) = 2; thereafter a(n) is the smallest number > a(n-1) which is neither of the form 2*a(i) nor Sum_{j=1..n-1} ( b_j*a(j) ) where 0 < i < n, b_j = 1 or 0.

Table of values

List of values

A331809 a(1) = 1; a(2) = 2; thereafter a(n) is the smallest number > a(n-1) which is neither of the form 2a(i) nor Sum_{j=1..n-1} ( b_ja(j) ) where 0 < i < n, b_j = 1 or 0.