A219865 First differences of A219795.

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;

Links

Table of n, a(n) for n=0..44.

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 A220349

Adjacent sequences: A219862 A219863 A219864 * A219866 A219867 A219868

Keyword

nonn,less

Author

Paul Curtz, Nov 30 2012

Status

approved