A393702 First number to occur at least n times in Weinstein's W sequence (A394611).

0, 0, 6, 6, 169, 469, 3615, 3681, 114621, 257690

Offset

1,3

Comments

Presumed infinite, but there is currently no proof.

Links

Table of n, a(n) for n=1..10.

Example

The first term of A394611 is 0, so 0 is the first number to occur once, a(1)=0.
The second term of A394611 is also 0, so 0 is the first number to occur twice, a(2)=0.
When we reach term 10 of A394611, the number 6 becomes the first number to appear 3 times, so a(3)=6.

Crossrefs

Cf. A394611, A397175.

Sequence in context: A328186 A123190 A244956 * A239532 A351793 A370711

Adjacent sequences: A393699 A393700 A393701 * A393703 A393704 A393705

Keyword

nonn,new

Author

Sean A. Irvine, Jun 28 2026

Status

approved