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A068672 Primes in A068671. 0
31, 421, 521, 7321, 84221, 94321, 147432221, 18964332221, 29149754433222221, 38191297654433322222221, 39191397654433332222221, 63312115121097765544433333322222222221 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..12.

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 A089561 A134072

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

STATUS

approved

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Last modified August 13 04:54 EDT 2020. Contains 336442 sequences. (Running on oeis4.)