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A209085 a(n) is the next larger than A208982(n) number with mutual Hamming distance 1. 2
3, 3, 7, 5, 7, 7, 11, 11, 13, 31, 17, 19, 19, 23, 23, 23, 31, 31, 29, 31, 31, 37, 47, 41, 43, 43, 47, 47, 47, 53, 59, 59, 61, 127, 67, 67, 71, 71, 71, 79, 73, 79, 79, 79, 83, 83, 89, 127, 97, 103, 101, 103, 103, 107, 107, 109, 127, 113, 127, 127, 127, 127 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

All terms are prime by construction of A208982, and prime p occurs k times iff 2^k||p+1. In particular, every prime of the form 4*k+1 occurs 1 time. Thus all odd primes are in the sequence.

LINKS

Table of n, a(n) for n=1..62.

EXAMPLE

Since 2^4 divides 48, but 2^5 not divides, i.e., 2^4||48, then 47 occurs four times.

CROSSREFS

Cf. A206853, A208982.

Sequence in context: A137695 A338768 A318456 * A086799 A218388 A308340

Adjacent sequences:  A209082 A209083 A209084 * A209086 A209087 A209088

KEYWORD

nonn,base

AUTHOR

Vladimir Shevelev, Mar 05 2012

STATUS

approved

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Last modified January 18 20:41 EST 2022. Contains 350455 sequences. (Running on oeis4.)