A262252 Even Quasi-Carmichael numbers.

598, 1886, 11590, 21098, 24734, 32578, 91078, 95170, 107606, 134930, 143318, 179998, 253598, 258482, 259010, 287274, 361730, 374402, 568514, 706142, 751394, 831290, 920782, 1074026, 1105646, 1327562, 1514602, 1548318, 1579394, 1742830, 1794854, 1808678, 1952222

Offset: 1

Author

Tim Johannes Ohrtmann, Sep 16 2015

Keywords

• nonn

Examples

			598 is even, composite and squarefree and at least one nonzero integer b exists such that for every prime factor p of n, p+b divides n+b (2): 598 = 2*13*23 and 4, 15, 25 all divide 600.
		

Links

• Tim Johannes Ohrtmann, Table of n, a(n) for n = 1..84

Crossrefs

Cf. A029562, A029564, A029566, A029568, A029570, A257750.

Programs

PARI

n=0; until(n==1000000, n+=2; if(!isprime(n), if(issquarefree(n), f=factor(n); k=0; b=0; until(b==n, b+=2; c=0; for(i=1, #f[, 1], if((n+b)%(f[i, 1]+b)>0, c++)); if(c==0, k++)); if(k>0, print1(n, ", ")))))