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A071297
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Number of n-digit terms of A070153.
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2
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2, 5, 4, 10, 8, 56, 8, 39, 10, 38, 9, 208, 15, 37, 95, 143, 7, 502, 2, 319, 184, 235, 2, 1631, 68, 142, 58, 614, 71, 14216, 14, 5286, 81, 149, 251, 4018, 12, 17, 79, 5162, 21, 43065, 34, 3858, 932, 140, 6, 12852, 27, 2457, 360, 1121, 37, 10014
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OFFSET
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1,1
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COMMENTS
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Pairs (r,s) = (A070152(k), A070153(k)) are such that sum(j=r to s, j) equals the concatenation of r and s.
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LINKS
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Table of n, a(n) for n=1..54.
R. Hoshino, Astonishing Pairs of Numbers, Crux Mathematicorum 27(1), 2001, p. 39-44.
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EXAMPLE
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a(3) = 4 since 119, 403, 533, 623 are the only three-digit terms of A070153.
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CROSSREFS
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Cf. A070152, A070153.
Sequence in context: A120119 A048678 A084432 * A114393 A180338 A100710
Adjacent sequences: A071294 A071295 A071296 * A071298 A071299 A071300
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KEYWORD
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nonn,base
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AUTHOR
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Lekraj Beedassy, Jun 11 2002
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EXTENSIONS
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Edited and corrected by Klaus Brockhaus, Jun 06 2003
a(6), a(7) and a(8) from Klaus Brockhaus, Jun 20 2003
a(6) corrected and terms a(9) onward added by Max Alekseyev, Feb 13 2012
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STATUS
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approved
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