A068672 Primes in A068671.

31, 421, 521, 7321, 84221, 94321, 147432221, 18964332221, 29149754433222221, 38191297654433322222221, 39191397654433332222221, 63312115121097765544433333322222222221, 743724181412109876655444433333322222222222221

Offset

1,1

Links

Sean A. Irvine, Table of n, a(n) for n = 1..20

Maple

for n from 1 to 300 do a := n:k := 2:d := floor(n/k); while(d>0) do a := d+10^( floor(evalf(log(d)/log(10))+0.0000000001 )+1)*a: if(d=1) then k := n:end if:k := k+1:d := floor(n/k):end do:b[n] := a; end do:j := 0:for i from 1 to 300 do if(isprime(b[i])) then j := j+1:q[j] := b[i]:end if:end do:seq(q[k], k=1..j);

Crossrefs

Cf. A068671.

Sequence in context: A069582 A175355 A068658 * A274202 A352606 A089561

Adjacent sequences: A068669 A068670 A068671 * A068673 A068674 A068675

Keyword

base,nonn

Author

Amarnath Murthy, Mar 02 2002

Extensions

More terms from Sascha Kurz, Mar 27 2002

a(13) from Sean A. Irvine, Mar 04 2024

Status

approved