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A368700
Partial sums of A368699.
3
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 3, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 5, 6, 6, 6, 7, 7, 7, 8, 8, 9, 9, 9, 10, 10, 10, 10, 10, 10, 11, 11, 11, 11, 11, 11, 12, 13, 13, 13, 13, 13, 13, 13, 13, 14, 14, 15, 16, 16, 17, 17, 17, 17, 17, 17, 18, 18, 19, 19, 20, 21, 22, 22, 23, 24, 25, 25, 26
OFFSET
0,21
LINKS
PROG
(PARI)
up_to = 1024;
A005940(n) = { my(p=2, t=1); n--; until(!n\=2, if((n%2), (t*=p), p=nextprime(p+1))); (t); };
A354989(n) = for(m=1, oo, if((m*(m+1))%n==0, return(gcd(n, 1+m)<gcd(n, m))));
A368699(n) = A354989(A005940(1+n));
A368700list(up_to) = { my(v=vector(up_to), s=A368699(0)); for(i=1, up_to, s += A368699(i); v[i] = s); (v); };
v368700 = A368700list(up_to);
A368700(n) = if(!n, A368699(0), v368700[n]);
CROSSREFS
Partial sums of A368699.
Sequence in context: A332298 A300404 A175214 * A095395 A029134 A303997
KEYWORD
nonn
AUTHOR
Antti Karttunen, Jan 11 2024
STATUS
approved