Numbers k such that A098572(k) - A098572(k-1) = 2.

Terms

a(0) =4a(1) =7a(2) =10a(3) =14a(4) =20a(5) =27a(6) =35a(7) =45a(8) =58a(9) =73a(10) =91a(11) =113a(12) =138a(13) =168a(14) =203a(15) =244a(16) =291a(17) =345a(18) =408a(19) =481a(20) =563a(21) =658a(22) =766a(23) =888a(24) =1027a(25) =1184a(26) =1361a(27) =1561a(28) =1786a(29) =2038