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A219865
First differences of A219795.
1
0, 0, 0, 1, 0, 2, 2, 3, 1, 5, 7, 10, 11, 14, 23, 33, 44, 54, 81, 114, 158, 212, 287, 407, 565, 777, 1050, 1471, 2036, 2813, 3863, 5310, 7370, 10183, 14046, 19296, 26726, 36909, 50955, 70251, 96867, 133886, 184841, 255092, 351673
OFFSET
0,6
COMMENTS
2,2,3, 5,7,10,11, 23,33,44, 81,114,158,212, 407,565,777, 1471,2036,2813,3863, 7370,10183,14046, 26726,36909,50955,70251, is a subsequence of A219795(n).
Consider A219795(n) and its successive differences:
2, 2, 2, 2, 3, 3, 5, 7, 10, 11, 16, 23, 33, 44; A219795(n)
0, 0, 0, 1, 0, 2, 2, 3, 1, 5, 7, 10, 11, 14; a(n)
0, 0, 1, -1, 2, 0, 1, -2, 4, 2, 3, 1, 3, 9;
0, 1, -2, 3, -2, 1, -3, 6, -2, 1, -2, 2, 6, 1;
FORMULA
a(n) = A219795(n+1) - A219795(n).
MAPLE
A219865 := proc(n)
A219795(n+1)-A219795(n) ;
end proc: # R. J. Mathar, Jan 06 2013
CROSSREFS
Sequence in context: A155980 A309531 A215222 * A016539 A345886 A373880
KEYWORD
nonn,less
AUTHOR
Paul Curtz, Nov 30 2012
STATUS
approved