A254638 Cardinality of Image^inf({ 2 }) under repeated base-n zero-split doubling.
2, 6, 2, 20, 13, 72, 3, 92, 42, 308, 34, 900, 178, 1739, 4, 3349, 443, 4523, 387, 14364, 1827, 18672, 234, 39426, 15882, 52664, 8858, 128253, 28346, 123087, 5, 259207, 87797, 363512, 44545, 671389, 182549, 1336282, 18049, 1289210, 634402, 2679419, 156629
Offset: 2
Examples
a(8) = 3 since f_8(2) = { 4 }, f_8(4) = { 1 }, f_8(1) = { 2 } so Image_8^inf({ 2 }) = { 1, 2, 4 } and |{ 1, 2, 4 }| = 3.
Links
- Hugo van der Sanden, Table of n, a(n) for n = 2..62
- Hugo van der Sanden, Perl and C implementations, Feb 03 2015
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