A366673 a(n) is the least triprime k such that k + n is the next triprime after k.
27, 18, 63, 8, 45, 12, 20, 130, 138, 154, 52, 30, 561, 78, 1194, 1930, 4277, 292, 5343, 26353, 4255, 7847, 34773, 18628, 71718, 72308, 168114, 64699, 43209, 227451, 239643, 17641, 97061, 162124, 924718, 930311, 488001, 7248711, 2986751, 704908, 4108654, 7220012
Offset: 1
Keywords
Examples
a(3) = 63 because 63 = 3^2 * 7 is a triprime and the next triprime is 63 + 3 = 66 = 2 * 3 * 11.
Links
- Martin Raab, Table of n, a(n) for n = 1..83
Programs
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Maple
T:= select(t -> numtheory:-bigomega(t) = 3, [$1..10^7]): dT:= T[2..-1]-T[1..-2]: V:= Vector(42): for i from 1 to nops(dT) do if dT[i] <= 42 and V[dT[i]] = 0 then V[dT[i]]:= T[i] fi od: convert(V,list);
Comments