OFFSET
1,2
COMMENTS
Terms at positions 2^k is found in A107948.
LINKS
Ivan Neretin, Table of n, a(n) for n = 1..8192
MATHEMATICA
Accumulate@Nest[Join[#, Accumulate@#] &, {1}, 7] (* Ivan Neretin, Jan 31 2018 *)
PROG
(PARI) {a(n)=local(A=[1, 1], B=[1]); for(i=1, #binary(n), B=concat(B, vector(#B, k, polcoeff(Ser(A)/(1-x), #B+k-1))); A=concat(A, B); ); B[n]}
CROSSREFS
KEYWORD
nonn
AUTHOR
Paul D. Hanna, May 28 2005
STATUS
approved