A248047 - cp's OEIS frontend

A248047 a(1)=88; for n>=1, a(n+1) is the smallest palindromic 4-almost prime with a(n) as a central substring.

n	a(n)
1	88
2	1881
3	218812
4	12188121
5	1121881211
6	111218812111
7	51112188121115
8	1511121881211151
9	815111218812111518
10	78151112188121115187
11	1781511121881211151871
12	917815111218812111518719
13	59178151112188121115187195
14	9591781511121881211151871959

[88, 1881, 218812, 12188121, 1121881211, 111218812111, 51112188121115, 1511121881211151, 815111218812111518, 78151112188121115187, 1781511121881211151871, 917815111218812111518719, 59178151112188121115187195, 9591781511121881211151871959]

cp's OEIS Frontend

A248047 a(1)=88; for n>=1, a(n+1) is the smallest palindromic 4-almost prime with a(n) as a central substring.

Table of values

List of values