A346304 - OEIS

A346304

Positions of words in A076478 that start with 1 and end with 0.

5, 11, 13, 23, 25, 27, 29, 47, 49, 51, 53, 55, 57, 59, 61, 95, 97, 99, 101, 103, 105, 107, 109, 111, 113, 115, 117, 119, 121, 123, 125, 191, 193, 195, 197, 199, 201, 203, 205, 207, 209, 211, 213, 215, 217, 219, 221, 223, 225, 227, 229, 231, 233, 235, 237

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

The sequences A346303, A171757, A346304, A346305 partition the positive integers. See A076478 for a guide to related sequences.

LINKS

Table of n, a(n) for n=1..55.

FORMULA

a(n) = 2*A062383(n)+2*n-1. - Chai Wah Wu, Mar 04 2026

EXAMPLE

The first fourteen words w(n) are 0, 1, 00, 01, 10, 11, 000, 001, 010, 011, 100, 101, 110, 111, so that a(1) = 5.

MATHEMATICA