A256638 Orders n of cyclotomic polynomials containing a coefficient with an absolute value greater than one, with n not divisible by 5.

273, 357, 429, 546, 561, 609, 627, 714, 759, 777, 819, 858, 897, 957, 969, 987, 1001, 1023, 1071, 1092, 1122, 1131, 1218, 1221, 1239, 1254, 1287, 1309, 1407, 1419, 1428, 1463, 1491, 1518, 1547, 1551, 1554, 1638, 1659, 1677, 1683, 1716, 1729, 1749, 1767, 1771, 1794, 1827, 1869, 1881, 1887, 1911, 1914, 1938

Offset

1,1

Comments

Numbers in A013590 that are not divisible by 5.

Links

Table of n, a(n) for n=1..54.

Prog

(PARI) is(n)=if(n%5, for(k=0, n, if(abs(polcoeff(polcyclo(n), k))>1, return(n))); 0)
for(n=1, 10^4, if(is(n), print1(n, ", "))) \\ edited by Michel Marcus, Apr 21 2018

Crossrefs

Cf. A013590, A013595.

Sequence in context: A043812 A043821 A217004 * A338557 A347882 A347888

Adjacent sequences: A256635 A256636 A256637 * A256639 A256640 A256641

Keyword

nonn

Author

Derek Orr, Apr 22 2015

Status

approved