A387028 a(n) is the minimum value where A262690(k) >= n^2 for all k >= a(n).

1, 4, 13, 24, 49, 44, 89, 99, 193, 164, 191, 243, 353, 314, 393, 428, 769, 515, 653, 723, 762, 884, 969, 1059, 1409, 1202, 1302, 1459, 1569, 1508, 1742, 1923, 3073, 2179, 2057, 2382, 2609, 2595, 2889, 2818, 3122, 3203, 3533, 3699, 3873, 3790, 4233, 4419, 5633

Offset

1,2

Comments

Sequence is interesting primarily because of A062535. If all members of A062535 were 0, then this sequence would be the same as the squares. But A062535 has some nonzero terms, so this sequence gets the upper limits.

Links

Table of n, a(n) for n=1..49.

Formula

a(n) <= 4*n^2.

Example

a(3) = 13 because 12 is the largest value of n where A262690(n) < 9.

Crossrefs

Cf. A062535, A262690.

Sequence in context: A085018 A255840 A001741 * A272702 A272734 A273414

Adjacent sequences: A387025 A387026 A387027 * A387029 A387030 A387031

Keyword

nonn

Author

J. Lowell, Aug 13 2025

Extensions

a(6) corrected by Sean A. Irvine, Sep 18 2025

Status

approved