A178823 - cp's OEIS frontend

A178823 a(1) = 1, a(n+1) = least k >= a(n) such that the sum of the number of letters in the English name of all values in the sequence through a(n), excluding spaces and hyphens (A005589), is prime.

n	a(n)
1	1
2	4
3	5
4	11
5	12
6	13
7	24
8	73
9	1103
10	1115
11	1117
12	1117
13	1117
14	1117
15	1117
16	1140
17	1144
18	1201
19	1217
20	1217
21	1323
22	1326
23	1340
24	1344
25	1374
26	1413
27	1413
28	1413
29	1413
30	1424
31	1441
32	1441
33	1480
34	1484

[1, 4, 5, 11, 12, 13, 24, 73, 1103, 1115, 1117, 1117, 1117, 1117, 1117, 1140, 1144, 1201, 1217, 1217, 1323, 1326, 1340, 1344, 1374, 1413, 1413, 1413, 1413, 1424, 1441, 1441, 1480, 1484]

cp's OEIS Frontend

A178823 a(1) = 1, a(n+1) = least k >= a(n) such that the sum of the number of letters in the English name of all values in the sequence through a(n), excluding spaces and hyphens (A005589), is prime.

Table of values

List of values