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A118550
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a(0)=1; a(n) = a(n-1) + n if n is in the sequence, a(n) = a(n-1) + 1 if n is missing from the sequence.
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0
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1, 2, 4, 5, 9, 14, 15, 16, 17, 26, 27, 28, 29, 30, 44, 59, 75, 92, 93, 94, 95, 96, 97, 98, 99, 100, 126, 153, 181, 210, 240, 241, 242, 243, 244, 245, 246, 247, 248, 249, 250, 251, 252, 253, 297, 298, 299, 300, 301, 302, 303, 304, 305, 306, 307, 308, 309, 310, 311
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OFFSET
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0,2
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LINKS
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Table of n, a(n) for n=0..58.
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MATHEMATICA
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f[s_] := Block[{n = Length@s}, Append[s, If[ MemberQ[s, n], 2s[[ -1]], s[[ -1]] + 1]]]; Nest[f, {1}, 60] - Robert G. Wilson v, May 17 2006
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CROSSREFS
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Sequence in context: A068370 A060167 A234588 * A126697 A162406 A129282
Adjacent sequences: A118547 A118548 A118549 * A118551 A118552 A118553
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KEYWORD
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easy,nonn
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AUTHOR
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Leroy Quet, May 03 2006
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EXTENSIONS
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More terms from Robert G. Wilson v, May 17 2006
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STATUS
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approved
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