OFFSET
1,1
EXAMPLE
Fifth row is 11, 18, 25, 32, 39, so a(5) = 125.
MATHEMATICA
a[n_] := For[r = 1, True, r++, ro = Table[Prime[n] + k* r, {k, 0, n - 1}]; If[AllTrue[Rest[ro], CompositeQ[#] && ! Divisible[#, Prime[n]] &], Return[ro // Total]]]; Table[a[n], {n, 1, 37}] (* Jean-François Alcover, Sep 26 2017 *)
PROG
(Magma) ap:=function(j) p:=NthPrime(j); a:=1; while true do S:=[ x: x in [p+a..p+a*(j-1) by a] ]; if forall(t) {x: x in S | not IsPrime(x) and x mod p gt 0 } then return [p] cat S; else a+:=1; end if; end while; end function; [ &+ap(j): j in [1..37] ];
CROSSREFS
KEYWORD
nonn
AUTHOR
Klaus Brockhaus, May 30 2009
STATUS
approved