Least k such that A359247(k) = n, or 0 if no such k exists.

Terms

a(0) =5a(1) =1a(2) =136a(3) =168a(4) =141a(5) =424a(6) =1867a(7) =680a(8) =3981a(9) =5800a(10) =2216a(11) =13648a(12) =5763a(13) =2728a(14) =8872a(15) =11944a(16) =15752a(17) =6824a(18) =15219a(19) =8352a(20) =17064a(21) =10920a(22) =10400a(23) =38407a(24) =25105a(25) =27304a(26) =36879a(27) =40501a(28) =37077a(29) =20323