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

1,1

Links

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

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

Crossrefs

Sequence in context: A209191 A162948 A024768 * A340112 A085557 A125665

Adjacent sequences: A024766 A024767 A024768 * A024770 A024771 A024772

Keyword

nonn,base,easy,fini,full

Author

David W. Wilson

Extensions

Ends at a(68) = 3444224222.

Status

approved