OFFSET
1,3
COMMENTS
Partial sums of minimal length pair-exchange / set-rotate sequence to reverse n distinct ordered elements. The subsequence of primes in this partial sum begins: 3, 7, 17.
FORMULA
a(n) = Sum_{i=1..n} A048200(i).
EXAMPLE
a(5) = 0 + 1 + 2 + 4 + 10 = 17 is prime.
CROSSREFS
KEYWORD
more,nonn
AUTHOR
Jonathan Vos Post, Apr 23 2010
EXTENSIONS
a(10)-a(11) from Sai Satwik Kuppili and Bhadrachalam Chitturi, Apr 16 2019
STATUS
approved