The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A110495

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A110495

Numbers n such that binomial(2n,n) is cubefree.
(history; published version)

#13 by Alois P. Heinz at Thu Jul 21 05:31:21 EDT 2022

STATUS

reviewed

approved

#12 by Joerg Arndt at Thu Jul 21 05:16:13 EDT 2022

STATUS

proposed

reviewed

#11 by Bert Dobbelaere at Thu Jul 21 04:28:33 EDT 2022

STATUS

editing

proposed

#10 by Bert Dobbelaere at Thu Jul 21 04:26:58 EDT 2022

COMMENTS

No more terms < 10^8. - Bert Dobbelaere, Jul 21 2022

STATUS

approved

editing

#9 by Bruno Berselli at Wed Oct 04 11:02:54 EDT 2017

STATUS

proposed

approved

#8 by Michel Marcus at Wed Oct 04 03:24:50 EDT 2017

STATUS

editing

proposed

#7 by Michel Marcus at Wed Oct 04 03:24:37 EDT 2017

PROG

(PARI) isok(n) = vecmax(factor(binomial(2*n, n))[, 2]) < 3; \\ Michel Marcus, Oct 04 2017

Discussion

Wed Oct 04

03:24

Michel Marcus: ok thanks

#6 by Joerg Arndt at Wed Oct 04 02:41:29 EDT 2017

KEYWORD

nonn,changed,fini,more

STATUS

proposed

editing

#5 by Michel Marcus at Wed Oct 04 02:35:23 EDT 2017

STATUS

editing

proposed

#4 by Michel Marcus at Wed Oct 04 02:35:00 EDT 2017

REFERENCES

J. W. Sander, A story of binomial coefficients and primes, Amer. Math. Monthly, Vol. 102, No. 9 (Nov. 1995), 802-807.

LINKS

J. W. Sander, <a href="http://www.jstor.org/stable/2974508">A story of binomial coefficients and primes</a>, Amer. Math. Monthly 102 (1995), 802-807.

STATUS

approved

editing

Discussion

Wed Oct 04

02:35

Michel Marcus: add keywords fini,more ?