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A081350 First column in maze array of natural numbers A081349. 5
1, 2, 3, 4, 15, 16, 35, 36, 63, 64, 99, 100, 143, 144, 195, 196, 255, 256, 323, 324, 399, 400, 483, 484, 575, 576, 675, 676, 783, 784, 899, 900, 1023, 1024, 1155, 1156, 1295, 1296, 1443, 1444, 1599, 1600, 1763, 1764, 1935, 1936, 2115, 2116, 2303, 2304, 2499 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

Interleaves A000466 with even squares A016742.

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..10000

Index entries for linear recurrences with constant coefficients, signature (1,2,-2,-1,1).

FORMULA

a(0)=1, a(1)=2, a(n)=(n-1)*(n+(-1)^n), n>1.

G.f.: -(2*x^6-10*x^4+x^3+x^2-x-1)/((1-x)^3*(1+x)^2). [Colin Barker, Sep 03 2012]

CROSSREFS

Cf. A081351, A081352.

Sequence in context: A035047 A037323 A065812 * A173320 A135633 A269725

Adjacent sequences:  A081347 A081348 A081349 * A081351 A081352 A081353

KEYWORD

nonn,easy

AUTHOR

Paul Barry, Mar 19 2003

STATUS

approved

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Last modified August 20 05:25 EDT 2019. Contains 326139 sequences. (Running on oeis4.)