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A183947 Number of strings of numbers x(i=1..n) in 0..3 with sum i^2*x(i) equal to n^2*3 2
1, 1, 2, 4, 10, 26, 61, 147, 339, 771, 1721, 3770, 8123, 17233, 36041, 74322, 151368, 304614, 606305, 1194266, 2329462, 4501905, 8624652, 16386814, 30891283, 57801169, 107387377, 198165046, 363321016, 662012254, 1199130676, 2159720707 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Column 3 of A183953

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..75

EXAMPLE

All solutions for n=4

..3....2....1....0

..1....3....1....0

..1....2....3....0

..2....1....1....3

CROSSREFS

Sequence in context: A007021 A100605 A247395 * A154322 A090031 A055775

Adjacent sequences:  A183944 A183945 A183946 * A183948 A183949 A183950

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 08 2011

STATUS

approved

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Last modified May 12 04:27 EDT 2021. Contains 343810 sequences. (Running on oeis4.)