The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A145076 Coefficient of x^(6^n) in Q(x)^(n+1), where Q(x) = Sum_{k>=0} x^(6^k)*(1 - x^(5*6^k))/(1 - x^(6^k)). 3
 1, 5, 25, 270, 3430, 52996, 968905, 20342540, 480982030, 12646108250, 365943140101, 11555148366323, 395323293564108 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS MAPLE Q:=proc(x, n) options operator, arrow: sum(x^(6^k)+x^(2*6^k)+x^(3*6^k)+x^(4*6^k)+x^(5*6^k), k=0..n) end proc: seq(coeff(Q(x, n)^(n+1), x, 6^n), n=0..6); # Emeric Deutsch, Oct 20 2008 PROG (PARI) {a(n, q=6)=local(Q=sum(j=0, n, (x^(q^j)-x^(q*q^j))/(1-x^(q^j)+O(x^(q^n+1))))); polcoeff(Q^(n+1), q^n)} CROSSREFS Cf. A007178, A145073, A145074, A145075. Sequence in context: A143600 A209529 A184958 * A185063 A165656 A145773 Adjacent sequences:  A145073 A145074 A145075 * A145077 A145078 A145079 KEYWORD more,nonn AUTHOR Paul D. Hanna, Oct 09 2008 EXTENSIONS a(6) from Emeric Deutsch, Oct 20 2008 a(7)-a(12) from Max Alekseyev, Dec 19 2011 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified February 28 08:28 EST 2020. Contains 332323 sequences. (Running on oeis4.)