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A047673
Row 4 of square array defined in A047671.
2
1, 13, 61, 193, 481, 1021, 1933, 3361, 5473, 8461, 12541, 17953, 24961, 33853, 44941, 58561, 75073, 94861, 118333, 145921, 178081, 215293, 258061, 306913, 362401, 425101, 495613, 574561, 662593, 760381, 868621, 988033, 1119361
OFFSET
1,2
FORMULA
n^4 - 2n^3 + 5n^2 - 4n + 1.
CROSSREFS
Sequence in context: A353223 A302560 A252970 * A231800 A141725 A279762
KEYWORD
nonn
STATUS
approved