A103860 Sum of divisors of prime(n)! - prime(n)# + 1.

1, 1, 112, 4832, 39929032, 6227388000, 355687500698712, 121674349040732800, 26204303786955547121568, 8844022735747817449795273936944, 8243360285859647409507002537385024

Offset

1,3

Comments

a(n) = A000203(A103855(n)).

Links

Table of n, a(n) for n=1..11.

R. Zumkeller, p(n)!-p(n )#+1

Mathematica

Module[{nn=15, pr, pm}, pr=Prime[Range[nn]]!; pm=FoldList[Times, Prime[Range[nn]]]; DivisorSigma[1, #[[1]]-#[[2]]+1&/@Thread[{pr, pm}]]] (* Harvey P. Dale, Dec 18 2022 *)

Crossrefs

Cf. A103859, A103895.

Sequence in context: A271671 A172129 A304552 * A265660 A271032 A213803

Adjacent sequences: A103857 A103858 A103859 * A103861 A103862 A103863

Keyword

nonn

Author

Reinhard Zumkeller, Feb 20 2005

Status

approved