|
| |
|
|
A146760
|
|
Last prime subtrahend at 10^n in A146759
|
|
3
| | |
|
|
|
OFFSET
| 1,1
|
|
|
COMMENTS
| It happens that under either 100^3 or 1000^2 the last prime subtrahend is 999983.
|
|
|
EXAMPLE
| A(2)=61 because 61 is the 7th and last prime subtrahend under 10^3.
|
|
|
PROG
| (Other) UBASIC: 10 'cu less pr are prime 20 N=1:O=1:C=1 30 A=3:S=sqrt(N):if N>10^3 then print N, C-1:stop 40 B=N\A 50 if B*A=N then 100 60 A=A+2 70 if A<=S then 40 80 R=O^3:Q=R-N 90 if N<R and N=prmdiv(N) and Q=prmdiv(Q) then if Q>1 print R; N; Q; C:N=N+2:C=C+1:goto 30 100 N=N+2:if N<R then 30:else O=O+1:goto 80
|
|
|
CROSSREFS
| A146756 A146757 A146759
Sequence in context: A012167 A162167 A134282 * A083082 A009825 A065919
Adjacent sequences: A146757 A146758 A146759 * A146761 A146762 A146763
|
|
|
KEYWORD
| easy,more,nonn
|
|
|
AUTHOR
| Enoch Haga (Enokh(AT)comcast.net), Nov 02 2008
|
| |
|
|
