A272817 Distance from n-th highly composite number (cf. A002182) to nearest prime or square.

0, 0, 0, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 11, 13, 1, 11, 1, 17, 1, 1, 13, 13, 1, 1, 17, 1, 17, 1, 1, 17, 17, 17, 1, 1, 19, 37, 37, 1, 1, 23, 1, 29, 1, 1, 19, 1, 19, 23, 1, 19, 31, 1, 19, 1, 1, 1, 1, 23, 1, 29, 23, 23, 1, 23, 71, 37

Offset: 1

Author

Vladimir Shevelev, May 07 2016

Keywords

• nonn

Comments

Conjecture: Terms are either 1 or prime, n>7. - Bill McEachen, Jun 11 2025

Links

• Giovanni Resta, Table of n, a(n) for n = 1..1000 (based on A002182 b-file)

Crossrefs

Cf. A002182, A005235, A117825, A141345.

Extensions

a(25)-a(77) from Giovanni Resta, May 07 2016