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A058968 a(n) = 2^n + 2^(n - 1) - n - 8. 1
1, 12, 35, 82, 177, 368, 751, 1518, 3053, 6124, 12267, 24554, 49129, 98280, 196583, 393190, 786405, 1572836, 3145699, 6291426, 12582881, 25165792, 50331615, 100663262, 201326557, 402653148, 805306331, 1610612698, 3221225433 (list; graph; refs; listen; history; text; internal format)
OFFSET

3,2

REFERENCES

B. Elspas, The theory of multirail cascades, in A. Mukhopadhyay, ed., Recent Developments in Switching Theory, Ac. Press, 1971, Chap. 8, see esp. p. 362 (YT(n)).

LINKS

Harry J. Smith, Table of n, a(n) for n = 3..200

FORMULA

G.f.: x^3*(1+8*x-8*x^2)/((1-x)^2*(1-2*x)). [Colin Barker, Apr 22 2012]

PROG

(PARI) { for (n = 3, 200, write("b058968.txt", n, " ", 2^n + 2^(n - 1) - n - 8); ) } \\ Harry J. Smith, Jun 24 2009

CROSSREFS

Sequence in context: A247893 A142074 A102085 * A195858 A121805 A195542

Adjacent sequences:  A058965 A058966 A058967 * A058969 A058970 A058971

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane, Jan 14 2001

STATUS

approved

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Last modified February 23 00:28 EST 2020. Contains 332157 sequences. (Running on oeis4.)