A024769 Every prefix prime in base 9 (written in base 9).

2, 3, 5, 7, 21, 25, 32, 34, 52, 58, 74, 78, 212, 218, 254, 322, 328, 342, 344, 528, 582, 744, 782, 784, 788, 2122, 2182, 2188, 2542, 2548, 3224, 3282, 3422, 3442, 3444, 5282, 7448, 7844, 7884, 21222, 21822, 25428, 25484, 32242, 32248, 34224, 34228, 34422, 34442

Offset: 1

Author

David W. Wilson

Keywords

• nonn
• base
• easy
• fini
• full

Links

• Nathaniel Johnston, Table of n, a(n) for n = 1..68 (full sequence)

Programs

Maple

s:=[1,2,4,5,7,8]: a:=[[2],[3],[5],[7]]: l1:=1: l2:=5: do for j from l1 to l2 do for k from 1 to 6 do d:=[s[k],op(a[j])]: if(isprime(op(convert(d, base, 9, 9^nops(d)))))then a:=[op(a), d]: fi: od: od: l1:=l2+1: l2:=nops(a): if(l1>l2)then break: fi: od: for j from 1 to nops(a) do printf("%d, ", op(convert(a[j],base,10,10^nops(a[j])))); od: # Nathaniel Johnston, Jun 21 2011

Extensions

Ends at a(68) = 3444224222.