Indices k such that A377091(k) is immediately followed by A377091(k+1) = -A377091(k).

Terms

a(0) =2a(1) =12a(2) =31a(3) =60a(4) =90a(5) =132a(6) =183a(7) =241a(8) =307a(9) =380a(10) =462a(11) =552a(12) =677a(13) =997a(14) =1125a(15) =1444a(16) =1563a(17) =1722a(18) =1892a(19) =2117a(20) =2257a(21) =2450a(22) =2652a(23) =2914a(24) =3081a(25) =3306a(26) =3540a(27) =3782a(28) =4033a(29) =4291