A078877 Nonprimes in A078447.

1, 689, 15229, 20569, 24139, 43531, 44377, 47077, 47941, 66767, 73441, 80419, 86447, 117739, 164783, 175793, 192433, 194321, 196283, 261853, 282533, 302083, 316933, 319373, 372091, 380431, 414863, 429713, 444361, 450613, 456853, 472547

Offset

1,2

Links

Table of n, a(n) for n=1..32.

Prog

(PARI) {s=[1]; for(n=2, 335, a=s[n-1]; if(!isprime(a), print1(a, ", ")); s=[a+1]; for(j=2, n, k=s[j-1]+1; c=1; while(c>0, b=1; for(i=1, matsize(s)[2], if(gcd(k, s[i])>1, b=0)); if(b==0, k++, c=0)); s=concat(s, k)))}

Crossrefs

Cf. A078447, A078448.

Sequence in context: A204153 A204146 A259512 * A204145 A284284 A115177

Adjacent sequences: A078874 A078875 A078876 * A078878 A078879 A078880

Keyword

nonn

Author

Klaus Brockhaus, Dec 10 2002

Status

approved