A219251 Numbers such that the absolute difference of a pair of adjacent decimal digits is not prime.

10, 11, 12, 15, 17, 19, 21, 22, 23, 26, 28, 32, 33, 34, 37, 39, 40, 43, 44, 45, 48, 51, 54, 55, 56, 59, 60, 62, 65, 66, 67, 71, 73, 76, 77, 78, 80, 82, 84, 87, 88, 89, 90, 91, 93, 95, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129

Offset

1,1

Comments

Complement of A219248; numbers which do not occur in A219249 and A219250; analog of what is A219110 to A182177, A182178.

Links

Table of n, a(n) for n=1..78.

Prog

(PARI) is_A219251(n)={for(i=2, #n=digits(n), isprime(abs(n[i-1]-n[i]))||return(1))}

Crossrefs

Sequence in context: A108697 A109279 A258744 * A154770 A320601 A305130

Adjacent sequences: A219248 A219249 A219250 * A219252 A219253 A219254

Keyword

nonn,base,easy

Author

M. F. Hasler, Apr 11 2013

Status

approved