If p and q are twin primes then pq + 1 is always divisible by 3, except for (p,q)=(3,5). Sequence gives values of (pq + 1)/3.

A165280

If p and q are twin primes then pq + 1 is always divisible by 3, except for (p,q)=(3,5). Sequence gives values of (pq + 1)/3.

Terms

    a(0) =12a(1) =48a(2) =108a(3) =300a(4) =588a(5) =1200a(6) =1728a(7) =3468a(8) =3888a(9) =6348a(10) =7500a(11) =10800a(12) =12288a(13) =13068a(14) =17328a(15) =19200a(16) =24300a(17) =26508a(18) =32448a(19) =40368a(20) =58800a(21) =62208a(22) =71148a(23) =90828a(24) =108300a(25) =120000a(26) =127308a(27) =137388a(28) =145200a(29) =218700

External references