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A023573
Sum of distinct prime divisors of prime(n)-3.
0
0, 0, 2, 2, 2, 7, 9, 2, 7, 15, 9, 19, 21, 7, 13, 7, 9, 31, 2, 19, 14, 21, 7, 45, 49, 9, 7, 15, 55, 18, 33, 2, 69, 19, 75, 39, 20, 7, 43, 24, 13, 91, 49, 26, 99, 9, 15, 18, 9, 115, 30, 61, 26, 33, 129, 20, 28, 69, 139, 141, 14, 36, 21, 20, 38, 159, 43, 169, 45, 175, 14
OFFSET
1,3
FORMULA
a(n) = sopf(prime(n)-3). - Wesley Ivan Hurt, Apr 13 2022
CROSSREFS
Cf. A000040, A008472 (sopf).
Sequence in context: A266689 A265988 A340976 * A138757 A158927 A367857
KEYWORD
nonn
STATUS
approved