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Search: id:A033571
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| 1, 18, 55, 112, 189, 286, 403, 540, 697, 874, 1071, 1288, 1525, 1782, 2059, 2356, 2673, 3010, 3367, 3744, 4141, 4558, 4995, 5452, 5929, 6426, 6943, 7480, 8037, 8614, 9211, 9828, 10465, 11122, 11799, 12496
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OFFSET
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0,2
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COMMENT
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a(n) = A153126(2*n) = A000566(2*n+1). [From Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Dec 20 2008]
For n>0: a(n)=A008596(n)+A158186(n); a(n)=A010010(n)-A158186(n). [From Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Mar 13 2009]
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FORMULA
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a(n)=20*n+a(n-1)-23 (with a(1)=1) [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Nov 16 2009]
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EXAMPLE
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For n=2, a(2)=20*2+1-23=18; n=3, a(3)=20*3+18-23=55; n=4, a(4)=20*4+55-23=112 [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Nov 16 2009]
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CROSSREFS
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A153127. [From Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Dec 20 2008]
Sequence in context: A069973 A041630 A088593 this_sequence A041632 A086540 A041634
Adjacent sequences: A033568 A033569 A033570 this_sequence A033572 A033573 A033574
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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