Numbers k where tan(k) decreases monotonically to 0 (or cot(k) increases).

Terms

a(0) =1a(1) =4a(2) =7a(3) =10a(4) =13a(5) =16a(6) =19a(7) =22a(8) =355a(9) =104348a(10) =312689a(11) =1146408a(12) =5419351a(13) =85563208a(14) =165707065a(15) =411557987a(16) =1480524883a(17) =2549491779a(18) =8717442233a(19) =14885392687a(20) =35938735828a(21) =56992078969a(22) =78045422110a(23) =99098765251a(24) =120152108392