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!)
 A193475 a(n) = 4*16^n - 2*4^n. 4
 2, 56, 992, 16256, 261632, 4192256, 67100672, 1073709056, 17179738112, 274877382656, 4398044413952, 70368735789056, 1125899873288192, 18014398375264256, 288230375614840832, 4611686016279904256, 73786976286248271872, 1180591620683051565056 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 LINKS Peter Luschny, The lost Bernoulli numbers. FORMULA Recurrence: a(0) = 2, a(1) = 56, a(n) = 20*a(n-1) - 64*a(n-2). G.f.: (16*x+2)/(64*x^2-20*x+1). E.g.f.: 4*exp(16*x) - 2*exp(4*x). MAPLE A193475 := proc(n) 2^(2*n+1); %^2; % - %% end: seq (A193475(n), n=0..20); CROSSREFS Sequence in context: A080268 A224297 A193476 * A246001 A009555 A054959 Adjacent sequences:  A193472 A193473 A193474 * A193476 A193477 A193478 KEYWORD nonn AUTHOR Peter Luschny, Aug 07 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 January 24 13:52 EST 2020. Contains 331194 sequences. (Running on oeis4.)