OFFSET
1,6
COMMENTS
Preface d(n) with a 1: (1, 1, 2, 2, 3, 2,...); then convolved with A159933 = the next term in d(n).
FORMULA
INVERTi transform of d(n): (1, 2, 2, 3, 2, 4, 2, 4, 3,...).
EXAMPLE
d(6) = 4 = (1, 1, 2, 2, 3, 2) dot (2, -1, 0, -1, 1, 1) = (2, -1, 0, -2, 3, 2) = 4.
CROSSREFS
KEYWORD
sign
AUTHOR
Gary W. Adamson, Apr 26 2009
EXTENSIONS
More terms from Alois P. Heinz, Mar 31 2016
STATUS
approved