R. L. Graham's sequence: a(n) = smallest m for which there is a sequence n = b_1 < b_2 < ... < b_t = m such that b_1*b_2*...*b_t is a perfect square.

A006255

R. L. Graham's sequence: a(n) = smallest m for which there is a sequence n = b_1 < b_2 < ... < b_t = m such that b_1*b_2*...*b_t is a perfect square.

Terms

    a(0) =1a(1) =6a(2) =8a(3) =4a(4) =10a(5) =12a(6) =14a(7) =15a(8) =9a(9) =18a(10) =22a(11) =20a(12) =26a(13) =21a(14) =24a(15) =16a(16) =34a(17) =27a(18) =38a(19) =30a(20) =28a(21) =33a(22) =46a(23) =32a(24) =25a(25) =39a(26) =35a(27) =40a(28) =58a(29) =42

External references