Combined Diophantine Chebyshev sequences A077249 and A077251.

Terms

a(0) =1a(1) =2a(2) =12a(3) =21a(4) =119a(5) =208a(6) =1178a(7) =2059a(8) =11661a(9) =20382a(10) =115432a(11) =201761a(12) =1142659a(13) =1997228a(14) =11311158a(15) =19770519a(16) =111968921a(17) =195707962a(18) =1108378052a(19) =1937309101a(20) =10971811599a(21) =19177383048a(22) =108609737938