A301857 The lesser of j,k, the smallest pair such that A023900(j) + A023900(k) = 0 and j,k are coprime.

1, 13, 37, 41, 61, 73, 89, 97, 109, 113, 185, 157, 181, 193, 233, 241, 277, 281, 323, 313, 337, 349, 353, 403, 397, 401, 409, 421, 433, 449, 457, 461, 527, 551, 521, 541, 577, 593, 601, 613, 617, 641, 661, 673, 701, 779, 733, 757, 761, 769, 959, 821, 829, 899, 877, 881, 929, 937, 953, 997, 1009, 1013, 1021, 1033, 1049

Offset

1,2

Comments

a(11) is the first term where neither j or k is prime.

A301591 is contained in this sequence.

Links

Table of n, a(n) for n=1..65.

Example

1 is a term since A023900(1) + A023900(2) = 0 and gcd(1,2) = 1.
185 is a term since A023900(185) + A023900(273) = 0 and gcd(185,273) = 1.

Crossrefs

Cf. A023900, A301591, A301374.

Sequence in context: A281004 A088963 A301591 * A220462 A280997 A185006

Adjacent sequences: A301854 A301855 A301856 * A301858 A301859 A301860

Keyword

nonn

Author

Torlach Rush, Mar 27 2018

Status

approved