A118578 Numbers n such that A118799(n) = 0.

21, 25, 29, 80, 1718, 4157, 4158, 5841, 20376, 23719, 28100, 28101, 28232, 32407, 32411, 45826, 49771, 56821, 58210, 59013, 62808, 63090, 63367, 65700, 66199, 71054, 82094, 83507, 86948, 94928, 95585, 99154, 101974, 126918, 126922, 127947

Offset

1,1

Links

Table of n, a(n) for n=1..36.

Formula

n such that the following matrix is singular:

|prime(n) prime(n+1) prime(n+2) prime(n+3) |

|prime(n+4) prime(n+5) prime(n+6) prime(n+7) |

|prime(n+8) prime(n+9) prime(n+10) prime(n+11)|

|prime(n+12) prime(n+13) prime(n+14) prime(n+15)|

Example

a(1) = 21 because A118799(21) = 0 because of the singular matrix:
| 73  79  83  89|
| 97 101 103 107|
|109 113 127 131|
|137 139 149 151|.
a(4) = 80 because A118799(80) = 0 because of the singular matrix:
|409 419 421 431|
|433 439 443 449|
|457 461 463 467|
|479 487 491 499|.

Crossrefs

Cf. A000040, A118799.

Sequence in context: A263276 A217150 A274178 * A276700 A181781 A324551

Adjacent sequences: A118575 A118576 A118577 * A118579 A118580 A118581

Keyword

nonn

Author

Jonathan Vos Post, May 24 2006

Extensions

More terms from Max Alekseyev, Sep 24 2011

Status

approved