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A159219 Number of n X n arrays of squares of integers with every 2X2 subblock summing to 18 0
30, 78, 166, 342, 678, 1350, 2662, 5286, 10470, 20838, 41446, 82662, 164838, 329190, 657382, 1313766, 2625510, 5248998, 10493926, 20983782, 41959398, 83910630, 167804902, 335593446, 671154150, 1342275558 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,1

LINKS

Table of n, a(n) for n=2..27.

CROSSREFS

Sequence in context: A039517 A185479 A045560 * A098998 A044168 A044549

Adjacent sequences:  A159216 A159217 A159218 * A159220 A159221 A159222

KEYWORD

nonn

AUTHOR

R. H. Hardin Apr 06 2009

STATUS

approved

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Last modified January 27 02:46 EST 2020. Contains 331291 sequences. (Running on oeis4.)