A137642 a(n) = ((p+1)^(p^2) - 1)/p^3 where p = prime(n).

10, 9709, 227442304239437611, 520133998799548061610162525309582775649689, 28625475946930159815792648419743565882735766383361881336675207769030472815497554882934618500487305220787275478803827031201317381, 22584369607535128530088608344394282118796031921761696815120424817179407960974433543597443656353115781613217726170809183176289639796122235605581762509509406198534210472574108288571227162377539

Offset

1,1

Links

Table of n, a(n) for n=1..6.

Mathematica

Table[ ((Prime[n] + 1)^(Prime[n]^2) - 1)/Prime[n]^3, {n, 1, 10} ]

Crossrefs

Cf. A137641 (((n-1)^(n^2) + 1)/n^3).

Cf. A133591 (((p-1)^(p^2) + 1)/p^3 where p = prime(n)).

Sequence in context: A208781 A125544 A137641 * A163019 A013746 A076782

Adjacent sequences: A137639 A137640 A137641 * A137643 A137644 A137645

Keyword

nonn

Author

Alexander Adamchuk, Jan 31 2008

Status

approved