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

Author

N. J. A. Sloane, Jul 09 2021

Keywords

• nonn
• base
• easy

Examples

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

Links

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

Crossrefs

Cf. A205510.

Programs

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