|
|
A319019
|
|
First differences of A319018.
|
|
9
|
|
|
0, 1, 8, 8, 40, 8, 56, 24, 120, 8, 56, 48, 240, 40, 208, 56, 280, 8, 56, 48, 240, 64, 384, 120, 568, 56, 264, 144, 688, 112, 560, 136, 648, 8, 56, 48, 240, 64, 384, 136, 648, 72, 400, 232, 1128, 200, 1048, 240, 1216, 48, 216, 160, 768, 200, 1176, 352, 1664
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
0,3
|
|
COMMENTS
|
Number of cells added at n-th stage to the structure of A319018.
See A319018 for further illustrations.
|
|
LINKS
|
|
|
FORMULA
|
Apparently, a(2^k + 1) = 8 for any k >= 0.
|
|
PROG
|
(PARI) A319019_upto(N, S=[], K=[[t\5-2, t%5-2]|t<-digits(6888528048, 25)])={ vector(N, n, #N=if(n>1, S=setunion(S, N); N=vecsort(concat([[Vecsmall(Vec(n)+k)|k<-K]|n<-N])); S=setunion(Set(vecextract(N, select(i->N[i-1]==N[i], [2..#N]))), S); setminus(Set(N), S), [[0, 0]]))} \\ Increase stack size with allocatemem() for N > 86. - M. F. Hasler, Dec 27 2018
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|