Smallest composite number which is 1 more than the product of n (not necessarily distinct) prime numbers.

A081547

Smallest composite number which is 1 more than the product of n (not necessarily distinct) prime numbers.

Terms

    a(0) =4a(1) =10a(2) =9a(3) =25a(4) =33a(5) =65a(6) =129a(7) =385a(8) =513a(9) =1025a(10) =2049a(11) =4097a(12) =8193a(13) =16385a(14) =32769a(15) =98305a(16) =131073a(17) =262145a(18) =524289a(19) =1048577a(20) =2097153a(21) =4194305a(22) =8388609a(23) =16777217a(24) =33554433a(25) =67108865a(26) =134217729a(27) =268435457a(28) =536870913a(29) =1073741825

External references