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a(n) = A000005(A103855(n)).
Table of n, a(n) for n=1..26.
R. Zumkeller, p(n)!-p(n )#+1
Cf. A103860, A103894.
Sequence in context: A095382 A135282 A179411 * A253808 A007400 A057696
Adjacent sequences: A103856 A103857 A103858 * A103860 A103861 A103862
Reinhard Zumkeller, Feb 20 2005