Pierpont 4-almost primes: numbers with exactly 4 prime divisors, not necessarily distinct, of the form 2^K*3^L + 1.
A111344
Pierpont 4-almost primes: numbers with exactly 4 prime divisors, not necessarily distinct, of the form 2^K*3^L + 1.
Terms
- a(0) =513a(1) =13825a(2) =32769a(3) =59050a(4) =110593a(5) =157465a(6) =177148a(7) =186625a(8) =262145a(9) =279937a(10) =497665a(11) =1259713a(12) =1327105a(13) =2097153a(14) =2125765a(15) =2519425a(16) =4718593a(17) =4782970a(18) =5668705a(19) =6718465a(20) =17915905a(21) =18874369a(22) =22674817a(23) =33554433a(24) =38263753a(25) =56623105
External references
- oeis: A111344