OFFSET
0,2
COMMENTS
LINKS
FORMULA
a(n) = 2*A151724(n+1)/3, n >= 1.
EXAMPLE
Written as an irregular triangle in which the row lengths are the terms of A011782 the sequence begins:
1;
4;
4,12;
4,12,20,28;
4,12,20,36,36,28,52,60;
4,12,20,36,36,36,68,100,68,28,52,92,108,76,124,124;
4,12,20,36,36,36,68,100,68,36,68,116,148,132,164,228,132,28,52,92,108,108,172,268,236,108,124,220,276,196,276,252;
...
It appears that the right border gives A173033.
CROSSREFS
KEYWORD
nonn,tabf
AUTHOR
Omar E. Pol, Mar 20 2015
STATUS
approved