Composites in base 10 that remain composite in exactly four bases b, 2 <= b <= 10, expansions interpreted as decimal numbers.
A256354
Composites in base 10 that remain composite in exactly four bases b, 2 <= b <= 10, expansions interpreted as decimal numbers.
Terms
- a(0) =115a(1) =2563a(2) =3523a(3) =5071a(4) =9193a(5) =10873a(6) =12223a(7) =12811a(8) =13231a(9) =15775a(10) =19111a(11) =20203a(12) =23089a(13) =25831a(14) =27007a(15) =28171a(16) =34189a(17) =39859a(18) =40033a(19) =43361a(20) =55033a(21) =57871a(22) =58813a(23) =74371a(24) =84253a(25) =89377a(26) =93043a(27) =95833a(28) =101683a(29) =117001
External references
- oeis: A256354