OFFSET
1,3
COMMENTS
Disjoint union of {0} and the following sequences: A048278 (gives 7 other cases where there are neither multiples of 4 nor 9 on row k), A249722 (rows where a multiple of 4 is found before a multiple of 9), A249726 (cases where the least term on row k which is a multiple of 4 is also a multiple of 9, and vice versa, i.e., such a term a multiple of 36).
LINKS
Antti Karttunen, Table of n, a(n) for n = 1..23590
PROG
(PARI)
A249724list(upto_n) = { my(i=0, n=0, dont_print=0); while(i<upto_n, for(k=0, n\2, if(!(binomial(n, k)%4), i++; write("b249724.txt", i, " ", n); dont_print=1; break, if(!(binomial(n, k)%9), dont_print=1; break))); if(!dont_print, i++; write("b249724.txt", i, " ", n), dont_print=0); n++); } \\ Ugly code.
CROSSREFS
KEYWORD
nonn
AUTHOR
Antti Karttunen, Nov 04 2014
STATUS
approved