%I #5 Dec 05 2013 19:55:33
%S 4,6,8,24,26,33,60,77,99,165,187,209,219,261,336,464,470,475,482,558,
%T 865,955,973,984,1106,1314,1424,1466,1492,1572,2066,2095,2098,2319,
%U 2584,2858,3013,3206,3279,3475,3660,3921,3978,4030,4706,5118,5947
%N Group the composite numbers so that the sum of the n-th group is a multiple of the n-th prime: (4), (6), (8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 22), (24, 25), (26, 27, 28, 30, 32), (33, 34, ...), ... Sequence gives the first term of each group.
%o (PARI) n=3:for(k=1,100,r=0:s=0:while(!s||(s%prime(k)>0),if(!isprime(n),s=s+n: if(!r,r=n)):n=n+1):print1(r","))
%Y Cf. A074124, A074126, A074127.
%K nonn
%O 1,1
%A _Amarnath Murthy_, Aug 27 2002
%E Corrected and extended by _Ralf Stephan_, Mar 23 2003