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A351072
a(n) is the number of prime(1+n)-smooth numbers larger than one whose k-th arithmetic derivative is zero for some k.
3
1, 5, 13, 57, 273, 1747, 12877, 105366
OFFSET
0,2
COMMENTS
Number of prime(1+n)-smooth terms > 1 in A099308 and in A351255.
See comments in A351071 about extending this sequence.
FORMULA
a(n) = A328307(A002110(1+n))-2.
CROSSREFS
Partial sums of A351071.
Sequence in context: A149552 A084136 A091147 * A149553 A149554 A149555
KEYWORD
nonn,hard,more
AUTHOR
Antti Karttunen, Feb 14 2022
STATUS
approved