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A121280
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Position where concatenate(1,...,n) occurs for the first time in the decimals of Pi (where 3, 1, 4,... are at position 0, 1, 2,...).
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15
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1, 148, 1924, 13807, 49702, 2458885, 9470344, 186557266, 523551502, 191278379839, 4368196101671
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OFFSET
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1,2
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COMMENTS
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This sequence uses the same convention for the "position" as sequences A035117, A050279 - A050287, A048940, A096755 - A096763, while A068987(n) = a(n)+1 counts the positions of 3,1,4,.... as 1,2,3,... - M. F. Hasler, Mar 18 2017
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LINKS
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FORMULA
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CROSSREFS
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Cf. A000796: Decimal expansion (or digits) of Pi.
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KEYWORD
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nonn,base,more
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AUTHOR
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EXTENSIONS
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New definition and cross-references from M. F. Hasler, Mar 18 2017
Additional term a(9), using subidiom search engine, from M. F. Hasler, Apr 13 2019
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STATUS
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approved
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