Smallest k such that A261029(k) = n.

Terms

a(0) =0a(1) =1a(2) =8a(3) =28a(4) =108a(5) =189a(6) =324a(7) =648a(8) =972a(9) =756a(10) =1701a(11) =2457a(12) =1512a(13) =3888a(14) =2268a(15) =4536a(16) =6048a(17) =13104a(18) =10584a(19) =15120a(20) =6804a(21) =16848a(22) =9072a(23) =14364a(24) =9828a(25) =28728a(26) =19656a(27) =21168a(28) =36288a(29) =31752