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A179007
Sum of 3 consecutive composite odd numbers.
1
45, 61, 73, 85, 95, 107, 119, 133, 145, 155, 163, 175, 185, 197, 209, 221, 233, 243, 253, 263, 271, 279, 287, 299, 315, 331, 343, 351, 357, 363, 369, 377, 387, 397, 409, 419, 429, 435, 445, 455, 467, 475, 485, 495, 505, 515, 523, 535, 545, 555, 561, 571, 585, 599
OFFSET
1,1
EXAMPLE
9+15+21=45, 15+21+25=61, 21+25+27=73,..
MATHEMATICA
t=Select[Range[2, 200], OddQ[#] && ! PrimeQ[#] &]; Plus @@@ Partition[t, 3, 1]
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved