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A073470
Trisection of A007294.
2
1, 2, 4, 6, 10, 15, 22, 32, 44, 60, 81, 107, 141, 181, 233, 295, 372, 465, 575, 710, 869, 1059, 1286, 1549, 1863, 2225, 2654, 3149, 3724, 4391, 5157, 6043, 7059, 8220, 9553, 11066, 12798, 14760, 16988, 19509, 22357, 25576, 29200, 33274, 37856, 42985
OFFSET
0,2
PROG
(Magma) function a007294(n, k) return n gt k*(k+1)/2 select a007294(n-k*(k+1)/2, k) + a007294(n, k+1) else n eq k*(k+1)/2 select 1 else 0; end function; [ a007294(n, 1): n in [0..135 by 3] ]; // Klaus Brockhaus, Jan 23 2009
CROSSREFS
KEYWORD
nonn
AUTHOR
Randall L Rathbun, Aug 26 2002
EXTENSIONS
More terms from Klaus Brockhaus, Jan 23 2009
STATUS
approved