cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

Showing 1-10 of 13 results. Next

A089561 Concatenations arising in A089560.

Original entry on oeis.org

1, 31, 431, 5431, 75431, 1475431, 91475431, 691475431, 57691475431, 1357691475431, 181357691475431, 17181357691475431, 1617181357691475431, 121617181357691475431, 20121617181357691475431
Offset: 1

Views

Author

Ray Chandler, Nov 22 2003

Keywords

Crossrefs

Cf. A089710, A089711, A089560-A089573.

A089573 Primes arising in A089572.

Original entry on oeis.org

19, 419, 5419, 35419, 735419, 9735419, 159735419, 14159735419, 114159735419, 60114159735419, 2660114159735419, 282660114159735419, 6282660114159735419, 206282660114159735419, 13206282660114159735419
Offset: 1

Views

Author

Ray Chandler, Nov 22 2003

Keywords

Crossrefs

Cf. A089710, A089711, A089560-A089572.

A089564 a(1) = 9. For n > 1, a(n) is the least unused number such that the decimal concatenation a(n)a(n-1)...a(2)a(1) is prime.

Original entry on oeis.org

9, 1, 4, 5, 3, 7, 12, 11, 13, 42, 26, 10, 17, 16, 20, 82, 29, 78, 57, 27, 28, 66, 45, 6, 69, 33, 236, 40, 116, 237, 196, 65, 133, 90, 60, 72, 80, 61, 126, 24, 153, 68, 88, 122, 43, 156, 231, 285, 125, 177, 249, 106, 36, 147, 23, 208, 483, 138, 281, 63, 108, 22, 38, 75, 159
Offset: 1

Views

Author

Ray Chandler, Nov 22 2003

Keywords

Comments

Is this a permutation of the positive integers?
The sequence is infinite by Dirichlet's theorem; Linnik's theorem gives an effectively computable bound on its members. Using Xylouris's version with L <= 5.2, a(n) = 9^(5.2^(n + O(log n))). - Charles R Greathouse IV, Apr 27 2010

Crossrefs

Cf. A089710, A089711, A089560-A089573.

A089562 a(1) = 7. For n > 1, a(n) is the least unused number such that every concatenation a(n)a(n-1)...a(2)a(1) is prime.

Original entry on oeis.org

7, 1, 3, 6, 2, 21, 10, 9, 8, 37, 20, 25, 29, 72, 28, 30, 27, 23, 39, 19, 51, 32, 22, 54, 42, 35, 24, 73, 36, 120, 44, 186, 4, 26, 126, 171, 70, 33, 18, 60, 113, 99, 81, 76, 47, 108, 91, 170, 159, 49, 65, 114, 238, 185, 285, 34, 98, 312, 63, 183, 15, 205, 230, 198, 310, 524
Offset: 1

Views

Author

Ray Chandler, Nov 22 2003

Keywords

Comments

Is this a rearrangement of the natural numbers?

Crossrefs

Cf. A089710, A089711, A089560-A089573.

Extensions

Edited by Charles R Greathouse IV, Apr 29 2010

A089566 a(1) = 11. For n > 1, a(n) is the least unused number such that every concatenation a(n)a(n-1)...a(2)a(1) is prime.

Original entry on oeis.org

11, 2, 4, 3, 5, 9, 1, 30, 6, 20, 16, 8, 24, 15, 13, 39, 36, 56, 64, 72, 29, 49, 27, 60, 54, 63, 65, 45, 12, 99, 28, 47, 88, 51, 83, 31, 59, 94, 336, 108, 182, 204, 184, 38, 37, 188, 210, 91, 62, 10, 224, 202, 128, 115, 66, 111, 156, 566, 43, 255, 279, 315, 180, 257, 102, 118
Offset: 1

Views

Author

Ray Chandler, Nov 22 2003

Keywords

Comments

Is this a rearrangement of the natural numbers?

Crossrefs

Cf. A089710, A089711, A089560-A089573.

Extensions

Edited by Charles R Greathouse IV, Apr 29 2010

A089568 a(1) = 13. For n > 1, a(n) is the least unused number such that every concatenation a(n)a(n-1)...a(2)a(1) is prime.

Original entry on oeis.org

13, 1, 2, 19, 3, 8, 15, 18, 10, 17, 45, 24, 22, 11, 37, 5, 30, 39, 81, 6, 76, 57, 69, 56, 84, 36, 49, 48, 38, 63, 148, 27, 75, 239, 31, 50, 171, 67, 116, 282, 42, 175, 23, 55, 236, 70, 278, 73, 90, 140, 91, 9, 210, 174, 126, 105, 89, 94, 224, 34, 114, 26, 133, 143, 54, 241
Offset: 1

Views

Author

Ray Chandler, Nov 22 2003

Keywords

Comments

Is this a rearrangement of the natural numbers?

Crossrefs

Cf. A089710, A089711, A089560-A089573.

Extensions

Edited by Charles R Greathouse IV, Apr 29 2010

A089570 a(1) = 17. For n > 1, a(n) is the least unused number such that every concatenation a(n)a(n-1)...a(2)a(1) is prime.

Original entry on oeis.org

17, 3, 6, 2, 1, 21, 35, 43, 23, 34, 47, 10, 26, 4, 14, 15, 12, 40, 18, 54, 51, 5, 27, 9, 132, 63, 166, 98, 78, 24, 30, 58, 105, 71, 75, 57, 70, 42, 11, 19, 38, 217, 285, 36, 77, 64, 56, 259, 45, 93, 102, 60, 122, 66, 96, 103, 267, 255, 92, 91, 276, 152, 208, 204, 90, 138
Offset: 1

Views

Author

Ray Chandler, Nov 22 2003

Keywords

Comments

Is this a rearrangement of the natural numbers?

Crossrefs

Cf. A089710, A089711, A089560-A089573.

Extensions

Edited by Charles R Greathouse IV, Apr 29 2010

A089571 Primes arising in A089570.

Original entry on oeis.org

17, 317, 6317, 26317, 126317, 21126317, 3521126317, 433521126317, 23433521126317, 3423433521126317, 473423433521126317, 10473423433521126317, 2610473423433521126317, 42610473423433521126317
Offset: 1

Views

Author

Ray Chandler, Nov 22 2003

Keywords

Crossrefs

Cf. A089710, A089711, A089560-A089573.

A089572 a(1) = 19. For n > 1, a(n) is the least unused number such that every concatenation a(n)a(n-1)...a(2)a(1) is prime.

Original entry on oeis.org

19, 4, 5, 3, 7, 9, 15, 14, 1, 60, 26, 28, 6, 20, 13, 74, 30, 111, 45, 12, 16, 11, 31, 102, 144, 72, 27, 65, 33, 79, 21, 77, 147, 91, 47, 96, 37, 2, 106, 200, 46, 54, 44, 75, 141, 126, 165, 178, 63, 36, 51, 78, 210, 170, 85, 143, 183, 70, 48, 83, 225, 411, 142, 461, 270, 124
Offset: 1

Views

Author

Ray Chandler, Nov 22 2003

Keywords

Comments

Is this a rearrangement of the natural numbers?

Crossrefs

Cf. A089710, A089711, A089560-A089573.

Extensions

Edited by Charles R Greathouse IV, Apr 29 2010

A089563 Primes arising in A089562.

Original entry on oeis.org

7, 17, 317, 6317, 26317, 2126317, 102126317, 9102126317, 89102126317, 3789102126317, 203789102126317, 25203789102126317, 2925203789102126317, 722925203789102126317, 28722925203789102126317
Offset: 1

Views

Author

Ray Chandler, Nov 22 2003

Keywords

Crossrefs

Cf. A089710, A089711, A089560-A089573.
Showing 1-10 of 13 results. Next

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