A336879 a(n) is the product of the decimal digits of A336876(n).

0, 1, 2, 3, 1, 4, 2, 5, 6, 3, 2, 7, 4, 8, 5, 9, 4, 3, 6, 1, 7, 6, 8, 4, 9, 8, 2, 2, 10, 5, 9, 12, 8, 3, 6, 14, 3, 12, 2, 16, 4, 4, 7, 12, 10, 18, 15, 4, 5, 18, 6, 16, 6, 12, 5, 21, 6, 15, 9, 4, 4, 20, 24, 3, 8, 6, 8, 14, 27, 9, 20, 24, 1, 18, 8, 9, 10, 6, 16

Offset

1,3

Links

Rémy Sigrist, Table of n, a(n) for n = 1..10000

Rémy Sigrist, C program for A336879

Formula

a(n) = A007954(A336876(n)).

a(n) * A336876(n) = A336826(n).

Example

For n = 26:
- A336876(26) = 24,
- so a(26) = 2*4 = 8.

Prog

(C) See Links section.

Crossrefs

Cf. A007954, A336826, A336876.

Sequence in context: A026276 A152201 A265579 * A340313 A120873 A125161

Adjacent sequences: A336876 A336877 A336878 * A336880 A336881 A336882

Keyword

nonn,look,base

Author

Rémy Sigrist, Aug 06 2020

Status

approved