A302938 - cp's OEIS frontend

A302938 Lexicographically first sequence of distinct terms such that the sum of any two terms is not a term of the sequence, and the sum of any two digits is not a digit of the sequence.

n	a(n)
1	1
2	2
3	4
4	7
5	44
6	47
7	74
8	77
9	444
10	447
11	474
12	477
13	744
14	747
15	774
16	777
17	4444
18	4447
19	4474
20	4477
21	4744
22	4747
23	4774
24	4777
25	7444
26	7447
27	7474
28	7477
29	7744
30	7747
31	7774
32	7777
33	44444
34	44447
35	44474
36	44477
37	44744
38	44747
39	44774
40	44777
41	47444
42	47447
43	47474
44	47477
45	47744
46	47747
47	47774
48	47777
49	74444
50	74447

[1, 2, 4, 7, 44, 47, 74, 77, 444, 447, 474, 477, 744, 747, 774, 777, 4444, 4447, 4474, 4477, 4744, 4747, 4774, 4777, 7444, 7447, 7474, 7477, 7744, 7747, 7774, 7777, 44444, 44447, 44474, 44477, 44744, 44747, 44774, 44777, 47444, 47447, 47474, 47477, 47744, 47747, 47774, 47777, 74444, 74447]

cp's OEIS Frontend

A302938 Lexicographically first sequence of distinct terms such that the sum of any two terms is not a term of the sequence, and the sum of any two digits is not a digit of the sequence.

Table of values

List of values