A334376 a(n) is the sum of digits of the n-th Moran number (A001101).

9, 3, 9, 6, 9, 9, 12, 3, 6, 9, 7, 8, 9, 12, 9, 10, 15, 18, 3, 9, 11, 6, 12, 13, 9, 14, 15, 9, 10, 12, 21, 6, 11, 9, 12, 15, 13, 7, 12, 14, 9, 15, 18, 16, 9, 17, 15, 18, 9, 10, 12, 18, 18, 21, 9, 11, 12, 18, 24, 15, 18, 27, 3, 8, 9, 10, 15, 18, 3, 7, 9, 12, 16

Offset

1,1

Links

Table of n, a(n) for n=1..73.

Formula

a(n) = A007953(A001101(n)).

Example

For n = 42:
- A001101(42) = 555,
- A007953(555) = 15,
- hence a(42) = 15.

Prog

(PARI) for (n=1, 1168, if (n%(s=sumdigits(n))==0 && isprime(n/s), print1 (s", ")))

Crossrefs

Cf. A001101, A007953, A334375.

Sequence in context: A276558 A196829 A019879 * A361062 A003565 A238105

Adjacent sequences: A334373 A334374 A334375 * A334377 A334378 A334379

Keyword

nonn,base

Author

Rémy Sigrist, Apr 25 2020

Status

approved