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Search: id:A007826
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| A007826 |
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Philadelphia Market-Frankford subway stops. |
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+0
5
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| 2, 5, 8, 11, 13, 15, 30, 34, 40, 46, 52, 56, 60, 63, 69
(list; graph; listen)
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OFFSET
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1,1
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FORMULA
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a(n) = 2 + 3 n - binomial(n, 4) + 3 binomial(n, 5) + 7 binomial(n, 6) - 66 binomial(n, 7) + 248 binomial(n, 8) - 679 binomial(n, 9) + 1554 binomial(n, 10) - 3158 binomial(n, 11) + 5897 binomial(n, 12) - 10352 binomial(n, 13) + 17384 binomial(n, 14)
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CROSSREFS
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Cf. A000053, A000054, A001049.
Adjacent sequences: A007823 A007824 A007825 this_sequence A007827 A007828 A007829
Sequence in context: A125217 A083422 A082406 this_sequence A108589 A093609 A140101
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KEYWORD
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nonn,fini,full
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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EXTENSIONS
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"Milbourne" actually comes between 63 and 69.
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