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Search: id:A080526
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| 1, 3, 10, 67, 627, 7781, 117652, 2097159, 43046725, 1000000009, 25937424606, 743008370699, 23298085122487, 793714773254157, 29192926025390632, 1152921504606846991, 48661191875666868489, 2185911559738696531985
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OFFSET
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1,2
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FORMULA
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For odd n, a(n) = n^(n-1) + (n-1)/2; for even n, a(n) = n^(n-1) + n - 1. Alternatively, a(n) = n^(n-1) + (n-1)/(1 + (n mod 2)). [From Max Alekseyev (maxale(AT)gmail.com), Oct 23 2008]
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PROGRAM
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(PARI) { a(n) = n^(n-1)+(n-1)/(n%2 + 1) } [From Max Alekseyev (maxale(AT)gmail.com), Oct 23 2008]
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CROSSREFS
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Cf. A080524, A080525.
Sequence in context: A009400 A004102 A072638 this_sequence A143083 A002499 A047833
Adjacent sequences: A080523 A080524 A080525 this_sequence A080527 A080528 A080529
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KEYWORD
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nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Mar 21 2003
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EXTENSIONS
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More terms and formula from Max Alekseyev (maxale(AT)gmail.com), Oct 23 2008
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