Dear seqfans, It is conjectured that A016910(n) = p_1 + p_2 + p_3 + p_4, where (p_1, p_2) and (p_3, p_4) are twin prime pairs. For example: A016910(1) = 36 = 5 + 7 + 11 + 13. Are there some research or paper or progress of this conjecture? Yours mike,