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

Author

Rémy Sigrist, Apr 25 2020

Keywords

• nonn
• base

Examples

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

Crossrefs

Cf. A001101, A007953, A334375.

Programs

PARI

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

Formula

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