A372166 Inverse permutation to A371985.
1, 2, 3, 4, 5, 6, 9, 8, 7, 10, 17, 11, 33, 18, 13, 16, 65, 14, 129, 12, 19, 34, 257, 20, 21, 66, 15, 25, 513, 22, 1025, 32, 35, 130, 37, 23, 2049, 258, 67, 24, 4097, 38, 8193, 36, 29, 514, 16385, 27, 41, 26, 131, 68, 32769, 30, 49, 40, 259, 1026, 65537, 28
Offset: 1
Keywords
Examples
A371985(42) = 70, so a(70) = 42.
Links
Programs
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PARI
\\ See Links section.
Formula
a(prime(k)) = 2^(k-1) + 1 for any k > 0 (where prime(k) denotes the k-th prime number).