Numbers n such that triangular(n) is representable as p*w, where p is a prime number and w is a prime power (A025475).

A225675

Numbers n such that triangular(n) is representable as p*w, where p is a prime number and w is a prime power (A025475).

Terms

    a(0) =2a(1) =7a(2) =9a(3) =16a(4) =17a(5) =18a(6) =25a(7) =26a(8) =31a(9) =53a(10) =81a(11) =97a(12) =121a(13) =127a(14) =162a(15) =241a(16) =250a(17) =256a(18) =337a(19) =361a(20) =486a(21) =577a(22) =625a(23) =841a(24) =1249a(25) =1458a(26) =2186a(27) =2401a(28) =2662a(29) =3361

External references