A071815 Decimal expansion of Sum_{k>=1} d(k!)/k! where d is the number of divisors function.

3, 1, 8, 9, 8, 1, 6, 5, 0, 5, 2, 1, 3, 3, 7, 5, 0, 6, 1, 1, 0, 8, 2, 5, 0, 0, 5, 9, 4, 9, 3, 7, 9, 7, 9, 1, 9, 5, 7, 3, 7, 3, 7, 1, 5, 0, 4, 9, 3, 3, 8, 9, 5, 7, 8, 6, 1, 9, 0, 1, 7, 1, 2, 8, 6, 9, 8, 0, 2, 7, 7, 7, 2, 8, 5, 8, 5, 9, 1, 9, 0, 5, 9, 6, 0, 1, 2, 9, 8, 3, 3, 4, 4, 4, 8, 6, 5, 3, 4

Offset

1,1

Links

Table of n, a(n) for n=1..99.

Example

3.18981650521337506110825005949379791957373715049338...

Prog

(PARI) suminf(k = 1, numdiv(k!)/k!) \\ Amiram Eldar, Apr 12 2026

Crossrefs

Cf. A000005, A027423, A048799.

Sequence in context: A076238 A008298 A039692 * A178301 A120236 A049760

Adjacent sequences: A071812 A071813 A071814 * A071816 A071817 A071818

Keyword

cons,nonn

Author

Don Reble, Jun 08 2002

Extensions

Name corrected by Amiram Eldar, Apr 12 2026

Status

approved