The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A067317 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A067317

Numbers k such that 1 + binomial(k,j) is prime for only 2 values of j (0 <= j <= k).
(history; published version)

#23 by Michael De Vlieger at Thu Jul 18 09:18:39 EDT 2024

STATUS

reviewed

approved

#22 by Joerg Arndt at Thu Jul 18 01:57:49 EDT 2024

STATUS

proposed

reviewed

#21 by Amiram Eldar at Thu Jul 18 01:54:14 EDT 2024

STATUS

editing

proposed

#20 by Amiram Eldar at Thu Jul 18 01:28:10 EDT 2024

KEYWORD

more,nonn,more,changed

#19 by Amiram Eldar at Thu Jul 18 01:27:16 EDT 2024

PROG

(PARI) is(n) = if(n == 1, 1, for(i=1, n\2, if(isprime(binomial(n, i) + 1), return(0))); 1); \\ Amiram Eldar, Jul 18 2024

#18 by Amiram Eldar at Thu Jul 18 01:26:48 EDT 2024

DATA

1, 3, 7, 15, 23, 31, 59, 63, 67, 81, 84, 93, 95, 127, 157, 170, 214, 239, 253, 255, 313, 470, 511, 622, 694, 1010, 1023, 1098, 1691, 2047, 3535, 3836, 3963, 4095, 6143, 7166, 8191, 11757, 12525, 12686, 16383, 32767

EXTENSIONS

a(42) from Amiram Eldar, Jul 18 2024

STATUS

approved

editing

#17 by Michel Marcus at Mon Mar 09 12:25:57 EDT 2020

STATUS

reviewed

approved

#16 by Joerg Arndt at Mon Mar 09 10:45:37 EDT 2020

STATUS

proposed

reviewed

#15 by Robert Israel at Mon Mar 09 10:37:36 EDT 2020

STATUS

editing

proposed

#14 by Robert Israel at Mon Mar 09 05:47:03 EDT 2020

DATA

EXTENSIONS

a(35)-a(41) from Robert Israel, Mar 09 2020

STATUS

approved

editing