A204908 -id:A204908 - cp's OEIS frontend

A204917 Least j such that n divides s(k)-s(j) for some k>j, where s(j)=(prime(j))^2.

1, 2, 1, 2, 1, 3, 1, 2, 1, 2, 1, 3, 1, 2, 1, 2, 1, 4, 1, 2, 1, 3, 7, 3, 1, 4, 1, 2, 1, 4, 1, 3, 1, 5, 2, 4, 11, 4, 1, 2, 1, 5, 1, 3, 1, 7, 13, 3, 1, 8, 1, 4, 15, 9, 1, 2, 1, 7, 1, 4

Offset: 1

Clark Kimberling, Jan 20 2012

nonn

For a guide to related sequences, see A204892.

Cf. A204916, A204908, A204900, A204892.

Mathematica
```
(See the program at A204916.)
```

A204918 Least prime p^2 such that n divides p^2-q^2 for some prime q satisfying q

Original entry on oeis.org

9, 25, 25, 25, 9, 49, 25, 25, 49, 49, 169, 49, 121, 121, 49, 25, 361, 121, 289, 49, 25, 289, 841, 49, 529, 361, 841, 121, 961, 169, 841, 121, 169, 529, 289, 121, 1849, 961, 121, 49, 1849, 289, 1681, 289, 49, 841, 2809, 121, 2209, 961, 361, 361, 3481

Offset: 1

Clark Kimberling, Jan 20 2012

nonn

For a guide to related sequences, see A204892.

Cf. A204916, A204908, A204900, A204892.

Mathematica
```
(See the program at A204916.)
```

A204920 a(n) = p(n)^2 - q(n)^2, where (p(n)^2, q(n)^2) is the least pair of squared primes for which n divides p(n)^2 - q(n)^2.

Original entry on oeis.org

5, 16, 21, 16, 5, 24, 21, 16, 45, 40, 165, 24, 117, 112, 45, 16, 357, 72, 285, 40, 21, 264, 552, 24, 525, 312, 837, 112, 957, 120, 837, 96, 165, 408, 280, 72, 888, 912, 117, 40, 1845, 168, 1677, 264, 45, 552, 1128, 96, 2205, 600, 357, 312, 1272, 432

Offset: 1

Clark Kimberling, Jan 20 2012

nonn

For a guide to related sequences, see A204892.

Cf. A204908, A204900, A204892.

Mathematica
```
(See the program at A204908.)
```

cp's OEIS Frontend

A204917 Least j such that n divides s(k)-s(j) for some k>j, where s(j)=(prime(j))^2.

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A204918 Least prime p^2 such that n divides p^2-q^2 for some prime q satisfying q

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Mathematica

A204920 a(n) = p(n)^2 - q(n)^2, where (p(n)^2, q(n)^2) is the least pair of squared primes for which n divides p(n)^2 - q(n)^2.

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Crossrefs

Programs

Mathematica