A345985 Hamming distance between prime(n) and prime(n+1) in base 10.

1, 1, 1, 2, 1, 1, 1, 2, 1, 2, 1, 2, 1, 1, 2, 1, 2, 1, 2, 1, 1, 2, 1, 2, 3, 1, 1, 1, 2, 2, 2, 1, 1, 1, 2, 1, 2, 1, 2, 1, 2, 1, 1, 1, 1, 3, 2, 1, 1, 2, 1, 2, 1, 1, 2, 1, 2, 1, 2, 1, 1, 3, 2, 1, 1, 2, 1, 1, 1, 2, 1, 2, 2, 1, 2, 1, 2, 3, 1, 1, 2, 1, 1, 1

Offset

1,4

Links

Hugo Pfoertner, Table of n, a(n) for n = 1..10000

Example

Prime(4) = 7, prime(5) = 11, the words 7 and 11  are at Hamming distance 2 apart, so a(4) = 2.

Prog

(PARI) \\ abs Hamming distance in decimal digits
dhd(j, k)={my(dj=digits(j), dk=digits(k), s=0); s=abs(#dj-#dk); for(i=1, min(#dj, #dk), s+=(dj[i]!=dk[i])); s};
a345985(limit)={my(pp=2); forprime(p=3, limit, print1(dhd(p, pp), ", "); pp=p)};
a345985(prime(85)) \\ Hugo Pfoertner, Jul 09 2021

Crossrefs

Cf. A205510.

Sequence in context: A300385 A317145 A330665 * A103765 A344772 A307610

Adjacent sequences: A345982 A345983 A345984 * A345986 A345987 A345988

Keyword

nonn,base,easy

Author

N. J. A. Sloane, Jul 09 2021

Status

approved