A069631 - cp's OEIS frontend

A069631 a(1) = 4; a(2n) = smallest prime starting (most significant digits) with a(2n-1). a(2n+1) = smallest prime ending (least significant digits)in a(2n).

n	a(n)
1	4
2	41
3	241
4	2411
5	32411
6	324113
7	6324113
8	63241133
9	1563241133
10	15632411339
11	815632411339
12	81563241133909
13	1981563241133909
14	198156324113390947
15	24198156324113390947
16	2419815632411339094781
17	212419815632411339094781

[4, 41, 241, 2411, 32411, 324113, 6324113, 63241133, 1563241133, 15632411339, 815632411339, 81563241133909, 1981563241133909, 198156324113390947, 24198156324113390947, 2419815632411339094781, 212419815632411339094781]

cp's OEIS Frontend

A069631 a(1) = 4; a(2n) = smallest prime starting (most significant digits) with a(2n-1). a(2n+1) = smallest prime ending (least significant digits)in a(2n).

Table of values

List of values