A321017 a(n) = floor(pi(n)/2).

0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 10, 10, 10, 10, 10, 10, 10, 10, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12

Offset

1,7

Comments

More terms than usual are displayed in order to distinguish this from neighboring sequences.

Links

Table of n, a(n) for n=1..100.

Crossrefs

Cf. A000720, A321018.

Suggested by A321005.

Sequence in context: A132090 A235043 A071538 * A138194 A133876 A321018

Adjacent sequences: A321014 A321015 A321016 * A321018 A321019 A321020

Keyword

nonn

Author

N. J. A. Sloane, Nov 09 2018

Status

approved