A281068 - cp's OEIS frontend

A281068 a(1) = 1. a(n) is the smallest natural number that is not already in the sequence such that the name of a(n) in English starts with the letter a(n-1) ends with, and a(n) makes the sequence extendable.

n	a(n)
1	1
2	8
3	2
4	101
5	11
6	9
7	18
8	19
9	91
10	81
11	82
12	102
13	103
14	83
15	85
16	87
17	92
18	105
19	88
20	3
21	89
22	801
23	802
24	107
25	93
26	803
27	805
28	807
29	95
30	808
31	10
32	97
33	98
34	12
35	809
36	810
37	99
38	811
39	901
40	812
41	813
42	902
43	108
44	13
45	903
46	814
47	905
48	815
49	907
50	908
51	21
52	816
53	909
54	817
55	910
56	911
57	912
58	818
59	913
60	914
61	915
62	916
63	917
64	918
65	919

[1, 8, 2, 101, 11, 9, 18, 19, 91, 81, 82, 102, 103, 83, 85, 87, 92, 105, 88, 3, 89, 801, 802, 107, 93, 803, 805, 807, 95, 808, 10, 97, 98, 12, 809, 810, 99, 811, 901, 812, 813, 902, 108, 13, 903, 814, 905, 815, 907, 908, 21, 816, 909, 817, 910, 911, 912, 818, 913, 914, 915, 916, 917, 918, 919]

cp's OEIS Frontend

A281068 a(1) = 1. a(n) is the smallest natural number that is not already in the sequence such that the name of a(n) in English starts with the letter a(n-1) ends with, and a(n) makes the sequence extendable.

Table of values

List of values

n	a(n)
1	1
2	8
3	2
4	101
5	11
6	9
7	18
8	19
9	91
10	81
11	82
12	102
13	103
14	83
15	85
16	87
17	92
18	105
19	88
20	3
21	89
22	801
23	802
24	107
25	93
26	803
27	805
28	807
29	95
30	808
31	10
32	97
33	98
34	12
35	809
36	810
37	99
38	811
39	901
40	812
41	813
42	902
43	108
44	13
45	903
46	814
47	905
48	815
49	907
50	908
51	21
52	816
53	909
54	817
55	910
56	911
57	912
58	818
59	913
60	914
61	915
62	916
63	917
64	918
65	919

n	a(n)
1	1
2	8
3	2
4	101
5	11
6	9
7	18
8	19
9	91
10	81
11	82
12	102
13	103
14	83
15	85
16	87
17	92
18	105
19	88
20	3
21	89
22	801
23	802
24	107
25	93
26	803
27	805
28	807
29	95
30	808
31	10
32	97
33	98
34	12
35	809
36	810
37	99
38	811
39	901
40	812
41	813
42	902
43	108
44	13
45	903
46	814
47	905
48	815
49	907
50	908
51	21
52	816
53	909
54	817
55	910
56	911
57	912
58	818
59	913
60	914
61	915
62	916
63	917
64	918
65	919

n	a(n)
1	1
2	8
3	2
4	101
5	11
6	9
7	18
8	19
9	91
10	81
11	82
12	102
13	103
14	83
15	85
16	87
17	92
18	105
19	88
20	3
21	89
22	801
23	802
24	107
25	93
26	803
27	805
28	807
29	95
30	808
31	10
32	97
33	98
34	12
35	809
36	810
37	99
38	811
39	901
40	812
41	813
42	902
43	108
44	13
45	903
46	814
47	905
48	815
49	907
50	908
51	21
52	816
53	909
54	817
55	910
56	911
57	912
58	818
59	913
60	914
61	915
62	916
63	917
64	918
65	919