login
A362930
Indices of 3's in A064353.
4
2, 3, 4, 8, 9, 10, 12, 14, 15, 16, 20, 21, 22, 24, 25, 26, 28, 29, 30, 34, 35, 36, 38, 40, 41, 42, 46, 47, 48, 50, 51, 52, 56, 57, 58, 60, 61, 62, 66, 67, 68, 70, 72, 73, 74, 78, 79, 80, 82, 83, 84, 86, 87, 88, 92, 93, 94, 96, 98, 99, 100, 104, 105, 106, 108, 109, 110, 114, 115, 116, 118
OFFSET
1,1
COMMENTS
This list is the symmetric difference of A146562 and the positive even numbers. Consequently, it is also the disjoint union of 2*A, 2*A+1, and 2*B, where A and B are A214641 and A214642 respectively. - Andrei Zabolotskii, Jul 06 2026
FORMULA
a(n) = A146562(n) - 2*n + 1. - Andrei Zabolotskii, Jul 06 2026
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Aug 12 2023
STATUS
approved