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A110147 10^((n^2-n)/2). 1
1, 1, 10, 1000, 1000000, 10000000000, 1000000000000000, 1000000000000000000000, 10000000000000000000000000000, 1000000000000000000000000000000000000 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

Sequence given by the Hankel transform (see A001906 for definition) of A082148 = {1, 1, 11, 131, 1661, 22101, 305151, 4335711, ...}; example: det([1, 1, 11, 131; 1, 11, 131, 1661; 11, 131, 1661, 22101; 131, 1661, 22101, 305151]) = 10^6 = 1000000.

LINKS

Table of n, a(n) for n=0..9.

FORMULA

a(n+1) is the determinant of n X n matrix M_(i, j) = binomial(10i, j).

a(n)=10a(n-1)^2/a(n-2), a(0)=a(1)=1. - Michael Somos, Sep 12 2005

PROG

(PARI) a(n)=10^binomial(n, 2) \\ Charles R Greathouse IV, Jan 17 2012

CROSSREFS

Cf. A006125, A047656, A053763, A053764, A109345, A109354, A109493, A109966.

Sequence in context: A154027 A013715 A135612 * A215023 A071925 A139101

Adjacent sequences:  A110144 A110145 A110146 * A110148 A110149 A110150

KEYWORD

nonn,easy

AUTHOR

Philippe Deléham, Sep 04 2005

STATUS

approved

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Last modified October 16 03:37 EDT 2019. Contains 328040 sequences. (Running on oeis4.)