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A104126
a(n) = prime(n)^(prime(n)+1).
7
8, 81, 15625, 5764801, 3138428376721, 3937376385699289, 14063084452067724991009, 37589973457545958193355601, 480250763996501976790165756943041
OFFSET
1,1
COMMENTS
Sum of reciprocals rapidly converges to 0.1374098524791901212366977116..
A182938(a(n)) = 0. [Reinhard Zumkeller, Feb 18 2012]
LINKS
Reinhard Zumkeller, Table of n, a(n) for n = 1..75
MATHEMATICA
#^(#+1)&/@Prime[Range[10]] (* Harvey P. Dale, Dec 12 2021 *)
PROG
(PARI) ptopp1(n) = { local(x, y, z, sr=0); forprime(x=1, n, y=x^(x+1); z=(x+1)^x; sr+=1./y; print1(y", "); ); print(); print(sr) }
(Haskell)
a104126 n = p ^ (p + 1) where p = a000040 n
-- Reinhard Zumkeller, Feb 18 2012
CROSSREFS
Sequence in context: A304655 A100399 A022504 * A100879 A080811 A249898
KEYWORD
easy,nonn
AUTHOR
Cino Hilliard, Mar 06 2005
EXTENSIONS
Offset corrected by Reinhard Zumkeller, Feb 18 2012
STATUS
approved