A068826 a(1) = 2; then the sequence of smallest primes (no zero digits to avoid ambiguity) not included earlier the concatenation of which is the cyclic pattern 23456789123456789123...

2, 3, 4567, 89, 1234567891, 23, 4567891, 23456789, 1234567891234567891234567891, 23456789123456789, 1234567891234567891234567891234567891234567891234567891234567891234567, 89123, 4567891234567

Offset

1,1

Comments

a(14)=89123456789123...789123 (527 digits), a(15)= 4567891234567891234567891, a(16)=23456789123456789123, a(17)=4...1 (61 digits) and a(18)=2...3 (38 digits). a(9) through a(11) and a(13) through a(18) have been certified prime with Primo. a(19)=4... has at least 2700 digits. - Rick L. Shepherd

Links

Table of n, a(n) for n=1..13.

Crossrefs

Sequence in context: A085943 A068661 A271631 * A085944 A137078 A146026

Adjacent sequences: A068823 A068824 A068825 * A068827 A068828 A068829

Keyword

base,nonn

Author

Amarnath Murthy, Mar 08 2002

Extensions

More terms from Rick L. Shepherd, May 25 2002

Status

approved