Least triangular number t such that t = prime(n)*triangular(m) for some m>0, or 0 if no such t exists.
A225503
Least triangular number t such that t = prime(n)*triangular(m) for some m>0, or 0 if no such t exists.
Terms
- a(0) =6a(1) =3a(2) =15a(3) =21a(4) =66a(5) =78a(6) =1326a(7) =190a(8) =1035a(9) =435a(10) =465a(11) =17205a(12) =861a(13) =903a(14) =9870a(15) =5565a(16) =1567335a(17) =16836a(18) =20100a(19) =2556a(20) =2628a(21) =49770a(22) =55278a(23) =4005a(24) =42195a(25) =413595a(26) =47895a(27) =10100265a(28) =5995a(29) =1437360
External references
- oeis: A225503