Array read by antidiagonals: row 1 is the semiprimes A001358; for m > 1, row m is the semiprimes that are the sum of two successive terms of row m-1.
A365448
Array read by antidiagonals: row 1 is the semiprimes A001358; for m > 1, row m is the semiprimes that are the sum of two successive terms of row m-1.
Terms
- a(0) =4a(1) =6a(2) =10a(3) =9a(4) =15a(5) =25a(6) =10a(7) =51a(8) =146a(9) =422a(10) =14a(11) =69a(12) =201a(13) =551a(14) =973a(15) =15a(16) =77a(17) =221a(18) =667a(19) =1858a(20) =2831a(21) =21a(22) =85a(23) =249a(24) =1191a(25) =89855a(26) =312493a(27) =127418369a(28) =22a(29) =95
External references
- oeis: A365448