Sequences

Inverse of 1802nd cyclotomic polynomial.

Composite numbers k such that phi(k) + 2 | sigma(k).

Inverse of 1804th cyclotomic polynomial.

Numbers k such that phi(k + 1) divides sigma(k).

Inverse of 1806th cyclotomic polynomial.

Inverse of 1807th cyclotomic polynomial.

Numbers n such that phi(n + 1) | sigma(n) for n congruent to 1 (mod 3).

Number of solutions of +- 1 +- 2 +- ... +- (n-1) +- n = 0 in which the partial sums +- 1 +- ... +- k (1<=k<=n) are all distinct.

Numbers k such that phi(k + 3) | sigma(k).

Numbers k such that phi(k + 4) | sigma(k).

Numbers k such that phi(k + 5) | sigma(k).

Numbers k such that phi(k + 6) | sigma(k).

Numbers k such that phi(k + 7) | sigma(k).

Inverse of 1815th cyclotomic polynomial.

Numbers k such that phi(k + 8) | sigma(k).

Inverse of 1817th cyclotomic polynomial.

Numbers k such that phi(k + 9) | sigma(k).

Inverse of 1819th cyclotomic polynomial.

Inverse of 1820th cyclotomic polynomial.

Numbers k such that phi(k + 10) | sigma(k).

Numbers k such that phi(k + 11) | sigma(k).

Numbers k such that phi(k + 12) | sigma(k).

Numbers k such that phi(k + 13) | sigma(k).

Numbers k such that phi(k) | sigma(k + 1).

Inverse of 1826th cyclotomic polynomial.

Inverse of 1827th cyclotomic polynomial.

Numbers k such that phi(k) | sigma(k + 2).

Inverse of 1829th cyclotomic polynomial.

Inverse of 1830th cyclotomic polynomial.

Numbers k such that phi(k) | sigma(k + 3).

Numbers k such that phi(k) | sigma(k+4).

Inverse of 1833rd cyclotomic polynomial.

Numbers k such that phi(k) | sigma(k + 5).

Numbers k such that phi(k) | sigma(k + 6).

Numbers k such that phi(k) | sigma(k + 7).

Inverse of 1837th cyclotomic polynomial.

Numbers k such that phi(k + 4) | sigma(k) for k not congruent to 0 (mod 3).

Numbers k such that phi(k + 7) | sigma(k) for k not congruent to 0 (mod 3).

Numbers n such that phi(n + 9) | sigma(n) for n not congruent to 0 (mod 3).

Numbers k such that phi(k + 12) | sigma(k) for k not congruent to 0 (mod 3).

Numbers k such that phi(k) | sigma(k + 8).

Inverse of 1843rd cyclotomic polynomial.

Numbers k such that phi(k) | sigma(k + 9).

Inverse of 1845th cyclotomic polynomial.

Inverse of 1846th cyclotomic polynomial.

Numbers k such that phi(k) | sigma(k + 10).

Inverse of 1848th cyclotomic polynomial.

Numbers k such that phi(k) | sigma(k + 11).

Numbers k such that phi(k) | sigma(k + 12).

Numbers k such that phi(k) | sigma(k + 13).