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A069580 Noninvertible n X n matrices mod 4 (i.e. over the ring Z_4). +0
2
2, 160, 176128, 2973761536 (list; graph; listen)
OFFSET

1,1

FORMULA

a(n) = 4^(n^2) - A065128(n)

CROSSREFS

Cf. A065128.

Sequence in context: A124225 A159030 A064071 this_sequence A109420 A162904 A139928

Adjacent sequences: A069577 A069578 A069579 this_sequence A069581 A069582 A069583

KEYWORD

nonn

AUTHOR

Sharon Sela (sharonsela(AT)hotmail.com), Apr 18 2002

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Last modified November 29 12:46 EST 2009. Contains 167659 sequences.


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